#squaliform

[haveyouseenthisanimal-irl]

[bemoreshark]

Every day I think about the harrison dogfish because it’s other name that it’s more commonly known by is the dumb gulper shark and just- just look at him

Hes so good and silly looking. As general knowledge, they’re found near Australia and New Zealand, they’re unfortunately endangered, and they’re slightly longer than a guitar or traffic cone.

[herpsandbirds]

Pacific Sleeper Shark (Somniosus pacificus), family Somniosidae, order Squaliformes, usually found in the depths of the North Pacific

video by MBARI

[jammerspyjammass]

You may not know this but im a huge fucking nerd

My favourite shark from each order:D ignore how goofy they are

[taxonomytournament]

Taxonomy Tournament: Shark Finale!

Orectolobiformes. This order is known as the carpet sharks. Members include nurse sharks, whale sharks, and Wobbegong sharks

Squaliformes. This order of sharks have two (typically spiny) dorsal fins. Memebrs include dogfish, gulper sharks, and the cookie-cutter shark, which gouges round chunks of flesh from larger animals

[uncharismatic-fauna]

Uncharismatic Fact of the Day

Can I offer you a dwarf lanternshark in this trying time? This species of shark is the smallest in the world, at only 20 cm (8 in) long, and is found at depths of 283–439 m (928–1,440 ft). The dwarf lanternshark gets its name for its ability to produce light from a series of f light-producing photophores along its back, which may help it to attract prey or disorient predators.

(Image: A researcher holding a dwarf lanternshark (Etmopterus perryi) by Javontae Murphy)

If you send me proof that you’ve made a donation to UNRWA or another organization benefiting Palestinians, I’ll make art of any animal of your choosing.

[unofficial-sean]

noped tf outta there

[fawnrats]

Papina

[dragonthunders01]

Spectember D14: The Future

Has been 200 million years since life on earth changed, a destructive astronomical event wiped out most of the surface life, leaving only the deep-water fauna almost untouched, and they have tried to recolonize the surface little by little, many squids, arthropods, bony fishes and also a very ancient group of vertebrates that passed this cataclysm, sharks.

Sharks have had a constant story of survival over the last 200 million years since they evolved, passing the KPg with ease, and counting back their oldest relatives that had similar body forms, that gives another 200 million years. Although people often want to remark they are sort of “living fossils” that’s just relative superficial as many groups that came before always had peculiar and unique anatomies for being of different groups, and now with the extinction of the surface-dwelling species like lamniform, there would be another wave of new differently forms, preserving some features of their predecessors but changed for the anatomical differences of other groups.

These are the Damselsharks, descendant of lantern sharks (Squaliformes, Etmopteridae) that took over the surface and diversified, sort of adopted a shape similar to the extinct  Lamniformes and so had to adjust some of their anatomy to make it fit to the pelagic predatory role in the ocean, with a drop shaped body and a tall head, very big eyes result of their still prevailing deep water behavior, as well prominent pectoral fins that resemble the ones of a mako shark, short dorsal, pelvic and anal fins and a well developed C shaped heterocercal tail. Their jaws remain similar to their ancestors in articulation and position, but adjusted to tear and cut meat with new types of dentitions depending of their prey.

Many species have lost their bioluminescence but others preserved it, even further developing certain communication behavior that can help them to coordinate whole groups while hunting, which one of the most impressive examples as well the largest species of this family, the Shakopath, a 4 meter long species with characteristic bioluminescent arrangement around the belly and different sized long spots around the pelvic region, they swim in large groups of 20 individuals, patrolling the surface for any potential prey, either large squids that camouflage with their environment and often compete for food or can hunt one of these sharks in an ambush; although also they can preffer fishes that swim or fly over the water, many of the pelagic species crustaceans and even other species of sharks which are also long distant relatives of the Damnselsharks.

[sad-trash-pigeon]

sharks are an elasmobranch fish, a subclass of cartilaginous fish. there are eight orders, or families, of sharks that are categorized by their biology !!

shark orders within elasmobranchii:

classifications;

heterodontiformes(bullhead or horn sharks) - five gill slits, a dorsal fin with a strong spine and flat and sharp teeth in their mouth. an example of this is horn sharks.

orectolobiformes(carpetshark) - five gill slits, 2 spineless dorsal fins, an anal fin and spiracles(paired openings which take in water and ventilate the gills) near their eyes. an example of this is whale sharks.

lamniformes(mackrel sharks) - five gill slits, a large mouth with several rows of teeth, two dorsal fins, and anal fin and the ability to maintain a higher body temperature than the water around them. an example of this is great white sharks.

carcharhiniformes(ground sharks) - five gill slits, moveable eyelids which protect their eyes from injuries, two spineless dorsal fins, an anal fin and a large mouth with sharp teeth located behind their eyes. an example of this is hammerhead sharks.

squaliformes(dogfish sharks)- found in nearly every marine habitat, they have long snouts and a short mouth, five gill slits, two fins, and no anal fin. an example of this is spiny dogfish.

hexanchiformes(primitive sharks) - six or seven gill slits, one dorsal fin, an anal fin, thorny teeth and most live in deep cold water. an example of this is frilled sharks.

pristiophoriformes(sawsharks) - long snouts similar to saws, five or six gill slits, two dorsal fins, no anal fin, wide pectoral fins, transverse teeth and most of them live in tropical waters. an example of this is longnose sawsharks.

squatiniformes(angel sharks) - flattened bodies, a mouth with dermal flaps in front of a short snout, nasal barbels, eyes and a spiracle on the top of their head and no anal fin. an example of this is angel sharks.

*if any information is incorrect please tell me! i will correct it on here and on my research document :)

@tearsonthepage

[muttism7]

Guys give me shark types/breeds to study and post about!!!

I’m starting with my first favorite, the Greenland Shark!!

The greenland shark is also known as the gurry shark or grey shark!! Its scientific name is the “Somniosus Mircocehphalus. It is a large shark in the “sleeper shark” family!!

Uhm uhm. Its full scientific categories are

Domain

Eukaryota

Kingdom

Animilia

Phylum

Chordata

Class

Chondrichthyes

Subclass

Elasmobranchii

Subdivision

Selachimorpha

Order

Squaliformes

Family

Somniosidae

Genus

Somniosus

Species

S. Microcephalus

They have the longest known lifespan of all of the vertebrae species!! Said lifespan is estimated to be around 250 - 500 YEARS!!!!! Like holy shit.

Its meat is actually toxic, however when its treated to reduce the toxins its actually eaten as a delicacy in iceland!!

Historically, it has been hunted mostly for its liver oil, that was until synthetic oil was developed. Now it is mostly hunted for its meat.

Some food they eat

Smaller sharks, Skates, Eels, Herring, Capelin, Arctic Char, Cod, Rosefish, Sculpins, Lumpfish, Wolffish, Flounder.

Small greenland sharks mostly eat squid!! ^^

Hmm…

Thats all for now!! :3

[haveyouseenthisanimal-irl]

List of Families within Squaliformes I’ve covered (each link leads to the tags for each family):

Squalidae

[precambrianhottopic]

pro tip if you have a favorite shark look up what order it's from :)) also put your favorite shark in the tags if you want :))

[explosivefins]

Sharks

Temporal range: Early Jurassic – Present

Clockwise from top left: spiny dogfish, Australian angelshark, whale shark, great white shark, horn shark, frilled shark, scalloped hammerhead and Japanese sawshark representing the orders Squaliformes, Squatiniformes, Orectolobiformes, Lamniformes, Heterodontiformes, Hexanchiformes, Carcharhiniformes and Pristiophoriformes respectively.

Scientific classification Edit this classification

Domain: Eukaryota

Kingdom: Animalia

Phylum: Chordata

Class: Chondrichthyes

Infraclass: Euselachii

Clade: Neoselachii

Subdivision: Selachimorpha

Orders

Galeomorphii

Carcharhiniformes

Heterodontiformes

Orectolobiformes

Lamniformes

Squalomorphii

Hexanchiformes

Pristiophoriformes

Squaliformes

Squatiniformes

Synonyms

Pleurotremata

Selachii

Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the Batoidea (rays and kin). Some sources extend the term "shark" as an informal category including extinct members of Chondrichthyes (cartilaginous fish) with a shark-like morphology, such as hybodonts. Shark-like chondrichthyans such as Cladoselache and Doliodus first appeared in the Devonian Period (419–359 million years), though some fossilized chondrichthyan-like scales are as old as the Late Ordovician (458–444 million years ago). The oldest modern sharks (selachimorphs) are known from the Early Jurassic, about 200 million years ago.[citation needed]

Sharks range in size from the small dwarf lanternshark (Etmopterus perryi), a deep sea species that is only 17 centimetres (6.7 in) in length, to the whale shark (Rhincodon typus), the largest fish in the world, which reaches approximately 12 metres (40 ft) in length. They are found in all seas and are common to depths up to 2,000 metres (6,600 ft). They generally do not live in freshwater, although there are a few known exceptions, such as the bull shark and the river shark, which can be found in both seawater and freshwater. Sharks have a covering of dermal denticles that protects their skin from damage and parasites in addition to improving their fluid dynamics. They have numerous sets of replaceable teeth.

Several species are apex predators, which are organisms that are at the top of their food chain. Select examples include the tiger shark, blue shark, great white shark, mako shark, thresher shark, and hammerhead shark.

Sharks are caught by humans for shark meat or shark fin soup. Many shark populations are threatened by human activities. Since 1970, shark populations have been reduced by 71%, mostly from overfishing. Sharks are spread across 512 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in alphabetical order.

I LOVE YOU THANK YOU /P

[taxonomytournament]

Taxonomy Tournament: Cartilaginous Fish

Squaliformes. This order of sharks have two (typically spiny) dorsal fins. Members include dogfish, gulper sharks, and the cookie-cutter shark, which gouges round chunks of flesh from larger animals

Squatiniformes. This order is made up of the angelsharks, which have flattened bodies and broad pectoral fins, and are bottom-dwelling ambush predators

[uncharismatic-fauna]

Uncharismatic Fact of the Day

Just like counting rings on a tree trunk, most sharks can be aged by the growth bands around their vertebrae. The greenland shark is a remarkable exception; as their soft vertebrae lack these bands, the age can only be determined by the layers on the lenses of their eyes. Some scientists also use radiocarbon dating, which can be useful as greenland sharks can easily live to be over 300 years old.

(Image: An ancient greenland shark (Somniosus microcephalus) by Franco Banfi)

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