The largetooth cookiecutter shark (Isistius plutodus) is the second species in the Isistius genus. (Learn about the cookiecutter shark here) It has a cigar-shaped body, a short snout and two spineless dorsal fins. It has a row of 19 large teeth on their lower jaw. The placement of their eyes may lead to a sort of binocular vision.
The species looks like the cookiecutter shark (Isistius brasiliensis). The two species can can be told apart by their colouration and how many teeth they each have in their mouth.
The largetooth cookiecutter shark grows to lengths of up to 50 cm (19.6 in). A 36.3 cm (14.3 in) long female was caught off Newcastle, New South Wales in 1988-- the first of this species in the Southern Hemisphere. The sole specimen is registered in the Australian Museum Ichthyology Collection (AMS I.28924-001). This species is also recorded in the Gulf of Mexico, off Japan and from eastern Atlantic to Australia.
So how do these animals feed? They latch onto their prey with their bear-trap teeth and then spin their bodies to take out that iconic cookie-shaped chunk of flesh out of whatever poor sucker they got. Don't worry, these bites are usually not fatal to large animals. If you don't think that's the coolest thing ever, get out. Literally, exit the web browser.
Sadly, not a lot else is known about the largetooth cookiecutter shark and the IUCN has listed them under Least Concern (LC).
ever heard of this shark?
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