What are the top 5 sea creatures?

Answer 1

There are far, far too many too list, however, here are a few:

Trilobites: animals similar in appearance to the horseshoe crab, that lived from 526 to 250 million years ago.

Anomalocaridids: long and narrow, invertebrate carnivores that lived from about 500 to 400 million years ago.

Ammonites: invertebrates with a snail-like shell that protected a squid-like body, and floated in the ocean, who lived from 400 to 65.5 million years ago.

Icthyosaurs: marine reptiles that resembled dolphins, or fish, and lived from 245 to 90 million years ago.

Plesiosaurs: marine reptiles with long or short necks, who ate fish and swam with flippers, and lived from 210 to 65.5 million years ago.

Hesperornithes: Fully aquatic birds that lived from 100 to 65.5 million years ago.

Mosasaurs: Huge, carnivorous marine lizards (up to 40 feet long), that lived from 85 to 65 million years ago.

Enchodus (or saber toothed herring): a small to medium predatory fish with two long "fangs," that lived from the late Cretaceous to the Eocene (perhaps 100 to 40 million years ago).

Basilosaurus: a very long and narrow relative of whales, that lived from 40.4 to 33.9 million years ago.

Megalodon: a shark that may have been up to 50 feet long, and lived from 25 to 1.5 million years ago.

There are also a number of prehistoric ocean animals that still exist today, such as:

Sharks and rays: evolved about 416 million years ago.

Coelocanth: a type of fish related to lungfish that evolved about 400 million years ago.

Cephalopods (invertebrates such as squid and octopi): evolved about 400 million years ago.

Barnacles: evolved about 500 million years ago.

Coral (yes, they are animals): evolved about 542 million years ago, although modern coral reefs didn't first appear until about 245 million years ago.

Answer 2

1. Basilosaurus was a long, serpent shaped ancestor of modern whales.

2. Megalodon was a 67 ft long shark, the largest shark and one of the biggest fish ever discovered.

3. Mosasaurs were large, carnivorous, marine lizards that lived during the late Cretaceous.

4. Plesiosaurs were a group of marine reptiles that lived during the Mesozoic. They were divided into two groups, those with long necks and those with short necks. They used their flippers for propulsion.

5. Icthyosaurs were marine reptiles that looked like fish. They had long, narrow snouts and vertical tail fins.