TLDR; Novice shark fanatic dives into the shark species occupying Casco Bay/Maine and takes a shot at guessing who may have killed a swimmer (:( sorry in your loss in case you are studying this) in Mackerel Cove, Harpswell, ME this weekend. (Instructional info, higher than you’re going to get at Shark Week this 12 months. I’m rolling my eyes on the line-up. For those who make me watch another Air Jaws or another celeb vs. the shark, I’ll simply lose it!) #1 Nice White, #2 Shortfin Mako.
So, it’s not clear if it’s a shark assault but however that’s what they’re anticipating. Might or not it’s a ship propeller? Who is aware of. I’ll preserve you up to date!
In fact, it is a human life and we’re unhappy that somebody has handed. That is fascinating to me due to how uncommon shark assaults within the state of Maine are! I instantly dive into “Who may or not it’s!?!?!” As a result of I wish to take random, irresponsible guesses on the species of a doable assault, not a confirmed assault. So, let’s start.
Shark species of Maine: Spiny Dogfish, Blue, Shortfin Mako, Nice White, Sand Tiger, Basking Shark, Porbeagle, Thresher, Greenland Shark
Location: Mackerel Cove, Harpswell, ME.
Notes about location: From Casco Bay in Portland, as much as Bay of Fundy in Nova Scotia the coast is scattered with islands and peninsulas. Mackerel Cove is on an island that stretches out into Casco Bay related to a different island by a bridge and so one and so forth till you attain the mainland. This space isn’t overly populated by locals, however vacationers find it irresistible. With COVID, tourism has slowed in Maine however I’m positive there are nonetheless an abundance of individuals up there. There are, after all, eating places alongside the waters and fishing boats (I’ve seen boats chopping up their catch and throwing the bits within the water for seals to eat). Common water temperature for Portland, ME (closest to this space) is 61F.
I’ve used Wikipedia, my very own information, information articles, research and such. I used my finest judgement to rule out silly-non-sense. I might be incorrect, please be at liberty to right me should you discover misinformation. I used the Household …. tag? after the names simply to indicate relations.
Spiny Dogfish (squalidae): Present in shallow waters and offshore all through a lot of the world. Measurement: mature males 80-100cm (as much as 39 inches–over Three toes) , mature females 98.5-159cm (as much as 69.6 inches-over 5 toes). Coloring: Grayish brown in colour and are countershaded (darker on the upperside and lighter on the underside)-both women and men. Food plan: squid, fish, crab, jellyfish, sea cucumber, shrimp and different invertebrates. Enjoyable reality: The title Spiny Dogfish comes from the spines on their again that they use in protection when captured/attacked. They’ll arch their again to pierce their assailant, leaking somewhat venom into the wound!
Evaluation: Could chew you, however not able to this doable assault.
Additionally, cute as a button.
Blue Shark (Carcharhinidae): Pelagic, discovered all through the world however prefers cooler waters (besides Antarctica). Measurement: mature males 182 cm to 282 cm (6 to 9.Three toes), mature females 220 cm to 330cm (7.2 to 10.Eight toes). In fact, they’re a deep blue and countershaded. Food plan: They love squid! Additionally, cuttlefish, pelagic octopus, lobster, shrimp, crab, bony fishes, small sharks, mammalian carrion (lifeless mammals floating about) and sea birds. Often seen consuming tuna- we bought that in Maine! They’re speedy! Clocked in at 43mph/70 kph. Noticed working collectively as a pack to herd prey into concentrated teams for feeding.
Evaluation: Pelagic species, so it might be very unusual for one to be in Mackerel Cove. They’ve bitten individuals earlier than, and clearly are opportunistic feeders (feeding off of shipwreck sailors and such—found in Worldwide Shark Assault Recordsdata from Florida Museum). Most unlikely on this occasion as a result of location of the assault. (Four deadly assaults on report, 9 not deadly, unprovoked assaults)
Shortfin Mako (lamnidae): Pelagic species that may also be discovered near shore, round islands and inlets however it’s uncommon. They’re warm-blooded (endothermic) and like waters larger than 61F, however they’ve been discovered as much as Nova Scotia (and are listed among the many sharks of Maine). Measurement: Common male 320 cm (or 10 toes) mature females exceeding 380 cm (12 toes) and 570kg or 1,260lbs. Huge shark! Very fairly metallic blue coloration and a silvery white stomach (so, sure countershaded). Gnarly, spiky tooth nice for catching their speedy prey. Food plan: Primarily consuming cephalopods and bony fish, however they love some tuna, bonitos and swordfish. Swordfish and tuna are a giant factor right here. Brief Fin Makos have been clocked at 45 mpg (74 kph)! One of many quickest species within the water. Enjoyable Reality: Brief Fin Makos have been noticed swimming beneath their prey, lunging vertically up and tearing off chunks! As talked about, they love swordfish and have been discovered with amputated swordfish payments impaled of their heads and gills. Unhappy Reality: Endangered and sometimes a focused species for shark fin soup and the oils of its liver :(.
Evaluation: As said above, open water species that sometimes comes inland. Eight non-fatal unprovoked assaults, 1 deadly unprovoked. Will assault boats and fishers after being hooked, additionally seen gnawing on propeller blades in documentaries! Analysis means that this shark targets one in all its favourite meals (Swordfish) throughout spawning season. Swordfish spawn in the summertime months in colder waters in shallow waters. Tis’ the season to be an aggressive feeder.
Nice White (lamnidae): Epipalagic- coastal and offshore in areas with temperatures between 54F and 75F (12-24 C). They’re discovered all all through the world with differ massive seasonal migration patterns. Measurement: males 340 to 400cm (11 to 13 toes) and females 460cm to 490 cm (15 to 16 toes) ~please be aware these are averages. In accordance with Brittanica males attain sexual maturity at 10 years (11.5 to 13 toes or 3.5 to Four meters) and females 12 to 18 years (15 to 16 toes or 4.5 to five meters) . Females have been discovered rising as much as 610cm (20 toes) and weight 4,200 to five,000 kilos (1,905 to 2,268 kgs). Tremendous large shark! Everyone knows they’re an attractive gray colour with a white underbelly (by this level, you possibly can guess what I’m going to say– countershaded). Food plan: fish, tuna, rays, different sharks, dolphins, porpoises, whales, sea turtles, sea otters, sea birds and pinnipeds (seals and walruses)…(I really feel like that ought to have a musical quantity). Actually, their weight-reduction plan shifts after they mature. As juveniles, they primarily eat fish. Round 340cm or 11 toes, they swap to marine mammals. I keep in mind, from a documentary years in the past, that after they undergo this transition there’s a clumsy studying curve. Principally, they get tripped up in form and the feel from fish to blubbery seal. They recommended that, that’s when bites on people occur probably the most. This might be a case of correlation, not causation. Enjoyable Reality: Teazer, 10 toes 651 pound, White Shark was caught off the coast of Nova Scotia July eighth. I simply checked Ocearch and he was simply within the Gulf of St. Lawrence. He’s on the cusp of sexual maturity based on what we discovered above. Apart: all of the sharks I’m seeing on Ocearch within the space are on the cusp or beneath the sizes to point sexual maturity. Nevertheless, it’s recommended that Nova Scotia could also be a breeding floor.
Particular Information: We shall be specializing in Harbor Seals and Grey Seals since they’re booming in Massachusetts and Maine as a result of Marine Mammal Safety Act (MMPA) (should you see a seal pup alone on the seashore, get away and do not contact it and keep your distance or you’re straight liable for it is mom abandoning it-that’s a narrative for one more day although). As a result of MMPA, seal populations have rebounded within the areas and now that the meals is again so are the sharks! That is why there have been growing numbers of shark sightings and assaults off of the coast of Cape Cod within the final 5+ years. In Harpswell, there’s a mountain climbing path on Orr’s Island (instantly related to the island the place our sufferer was attacked) the place you possibly can see seals jumping–just sea the google evaluations of Satan’s Again Path.
Evaluation: Legitimate contender. 274 not deadly unprovoked, 52 deadly provoked, the very best variety of all sharks. I hate to be the basic Discovery Channel Shark Assault present, buuut most likely my #1 given the particular data.
Sand Tiger (odontaspididae): Epipelagic and mesopelagic (they’re present in shallow waters close to prices and within the twilight zone-light ranges and elbow room won’t restrict them!). They usually like heat waters however pup in the summertime time in comparatively cool waters 61F. GASP! That is the typical temp in Portland! Pups will transfer away with the times get shorter and temperatures begin to drop. They’ll return in the summertime although. Measurement: 200 cm (6.6 toes) to 320 cm (10.5 toes) (not often attain over 300 cm), 159 kg or 351 kilos. There are 4 species of Sand Tiger Shark, we’re specializing in Carcharias taurus (aka Gray Nurse Shark, Noticed Ragged-Tooth Shark or Blue Nurse Sand Tiger) since that is the one discovered within the Gulf of Maine. They’re gray to mild brown above and grayish-white beneath (countershaded) with reddish-brown spots on their backs, yellowish-brown on juveniles. They’ve (I feel) a cool, chunky physique and gnarly teeth-their most distinguishing traits. Regardless of trying ferocious, they’re fairly docile (I imply, any animal CAN chew, they simply aren’t like… a Tiger or a Bull Shark). Food plan: 60% bony fish! Rays and skates. Enjoyable Reality: Sand Tiger Sharks aka Gray Nurse Sharks usually are not Tiger Sharks and never Nurse Sharks. Sand Tiger Sharks belong to the household Odontaspididae, Tiger Sharks belong to the household Carcharhinidae, Nurse Sharks belong to the household Ginglymostomatidae. Additionally! they gulp air to assist them float.
Evaluation: In all probability not Sand Tiger Shark. They’re docile, have by no means killed anybody and are liable for 35 non-fatal unprovoked assaults. They feed on fish on the ocean flooring, not just like the Blue, Brief Fin Mako or Nice White. I might be genuinely stunned if this shark was accountable.
Basking Shark (cetorhinidae): Coastal-pelagic, they just like the open waters and peaking their heads as much as say “Hello” to the swimmers—not actually however you already know what I imply. They’ve been tracked close to the continental shelf and in deeper waters. They like cooler waters 46 to 58 F or Eight to 14.5 C. The most important measured was within the Bay of Fundy, between Nova Scotia and New Brunswick it was 1,227 cm, or 40.Three toes! It weighed 16 lengthy tons, 18 quick tons (what’s a brief ton? Per Google, 2,000 kilos (907.18474 kg) a brief ton, a protracted ton is 2,240 kilos). Colours are extremely variable darkish brown to black or blue dorsally, fading to uninteresting white ventral-ly (on their tummy… so they’re countershaded!). Food plan: zooplankton, very small fish and invertebrates. Unhappy Reality: Used typically for shark fin soup, animal feed and their liver oil. They’re endangered.
Evaluation: They don’t seem to be at risk of me being suspicious of them. They could not have accomplished it, they’re filter feeders. You simply go be you and float round York, ME (cannot entry the information tales with out subscriptions, however belief me.)
Porbeagle Shark (Lamnidae): Predominately pelagic, but additionally goes to coastal waters. They’ve a worldwide distribution and are endothermic (heat blooded). The North Atlantic Porbeagle has been present in 41 to 51F (5 to 10C) . They’ve been noticed in New Foundland, Canada, Russia, throughout. Siza: Sometimes 250cm (8.2 toes) and 298 kilos (135kg). They’re gray on high with a white underbelly (you possibly can fill it what I’ll say at this level). They type of appear to be somewhat Nice White. They’re stout little chunkers. Food plan: Small to medium sized bony fish, squid and different cephalopods, smaller sharks like Spiny Dogfish, every now and then. They’re a weak species. Enjoyable Reality: Porbeagles have crimson muscle which permits them to have higher stamina, decrease power prices. Just like tuna and the Mako Shark.
Evaluation: Greater than possible, not. They eat smaller prey and people can be too large for them. They’ve bitten although! 2 non-fatal assaults on report.
Edit: There was a shark assault in Maine 10 years in the past and it was a Porebeagle Shark! Discovered that out from the information briefing.
Thresher Shark (alopiidae): Primarily pelagic, however generally seen in coastal waters. They’re discovered a bit in all places however are uncommon in Central and Western Pacific waters. Just like the Porbeagle, they’re endothermic/heat blooded and have a strip of crimson muscle. This permits them to manage their temperature and endure some chilly climates. They’re slender sharks, and their colours vary from brownish, bluish or purplish grey with a whitish underbelly. They’ve large eyes, and an enormous tail the size of their physique (as lots of you already know, used to stun their prey). Food plan: pelagic education fish akin to bluefish, juvenile tuna, mackerel, squid and cuttlefish.
Evaluation: Not a menace to people!
Greenland Shark (somniosidae): Aka Sleeper Shark, it’s recommended that they are often discovered wherever (deep water smart). They’ve been discovered within the Gulf of Maine and the Gulf of Mexico. It could endure 33.Eight to 53.6 levels (1 to 12 C). They’ve been seen in shallower waters throughout colder months. Sometimes, they’re discovered new Iceland, Greenland, Newfoundland, Cape Cod and the Gulf of St. Lawrence. They’re extraordinarily gradual transferring, able to small bursts of velocity. They’re a creamy grey to a brownish grey, however they don’t seem to be countershaded (do not want the camouflage if you find yourself in the dead of night, seedy, depths), they usually generally have spots on their backs. We’re used to seeing the standard physique lay out of lamniformes, they’ve solely two dorsal fins, no anal fin just like the Spiny Dogfish. They’re 640cm to presumably 730cm (21 to 24 toes) a 2,200 kilos (1,000 kg) presumably 3,100 kilos (1,400 kg). Food plan: Something… nicely nearly. It largely eats fish, sharks, skates, eels, herring capelin and different fish. Additionally discovered of their stomachs: polar bears, seals and reindeer. They’re scavengers that may eat mammalian carrion after they have the possibility. Right here is story of 1 choking on a moose! It swims at 0.76 (1.22 kmh) miles per hour and might cruise as much as 1.6 mph (2.6 kmh). They’ll dwell 300- estimated 500 years and are oviparous.
I do not know the way legitimate that is, however the web tells me a swimmer with common expertise can transfer roughly 2 miles per hour. If somebody is swimming in a cove, I might assume they love the ocean, love swimming and spend a while within the water. If that’s true, then I feel the attacked particular person may out swim this shark. Take that Shark Week!
Evaluation: There are not any information of this shark attacking individuals. It sounds prefer it has bother attacking a lot of something. So, I’m going to rule him out primarily based on my intestine feeling.
So, I feel most likely a Nice White, second guess a Shortfin Mako.
What are your ideas?
Properly, already an replace: I simply googled to see if there was any updates and there’s! Like proper after I submitted this. Cease studying right here if you don’t want to know and wish to guess. They’re suspecting a gw. I’m abbreviating so that you do not by accident bounce to it. Hereis the information article.