Decapoda - Tumblr Posts

could I get some cursed biology facts about shrimp please? thank you!

shrimp are normally pretty slow swimmers, using their swimmerets as paddles to cruise slowly through the water looking for food!

but in an emergency, shrimp can skedaddle AMAZINGLY fast, scooting away at about 30 body-lengths-per-second over short distances, which is so quick that they straight-up look like they're teleporting.

Fossil Shark Teeth ID Project - Part 1

I am currently working on a shark teeth ID project. It is a personal project I am working on because I got gifted a multitude of fossil shark teeth of various species.

I am fairly sure that the teeth (seen in the two pictures below) belong to the family Lamnidae and are from the species Cosmopolitodus hastalis.

If these teeth are in fact the teeth of Cosmopolitodus hastalis they ought to date back to the Miocene and Pliocene (which are the two epochs of the Neogene). Although the species was still alive during the Pleistocene, fossils found of Cosmopolitodus hastalis in Cadzand (in the Netherlands) date back to the Miocene and Pliocene.

One of the shark teeth (the left picture below) gifted to me is so severely eroded that I cannot visually identify it, however it is still a gorgeous fossil.

Between the various shark teeth I also found what I suspect to be a part of a fossilised chela (claw/pincer of a crab) (seen in the right picture below). Considering the location of the find I think it might be from Carcinus maenas and could date back to the Pliocene.