Add the largest turtle ever to your zoo. Shares exhibit requirements with my Bananogmius and Platecarpus!

Add the tallfin pelagic angelfish thing to your zoo. Shares exhibit requirements with my Archelon and Platecarpus!

Add this random small coelacanth to your zoo. Shares exhibit requirements with my Parapuzosia!

Add the biggest ammonite to your zoo. Shares exhibit requirements with my Macropoma!

It may not explain every natural phenomenon, but this plesiosaur will make a great addition to your zoos.

Add the weird horseshoe crab-turtle-reptile... thing to your zoo.

Did you know the base game's swordfish has the id of 'marlin'? Anyways here's the ACTUAL marlin. Featuring two different sprites for each gender!

Adds the prehistoric Mexican eagle ray shark thing to your zoo. Ay!

Add the bigeye tuna-reptile to your zoo.

Adds the giant x-ray fish to your zoo.

Adds the giant Miocene shark, the not-clam, the thing that's definitely not in the Mariana Trench, the one from that 2013 documentary, the... you get the idea.

Adds the fish that shares its name with a whale to your zoo.

Adds the Western Interior Seaway's apex predator to your zoo.

Adds the kihada maguro to your zoo. Somewhat reasonably sized instead of whatever the base tuna has going on.