10 Sea Creatures That Are Not Fish

Our seas and oceans have a diverse species such as fishes, octopus and squids. They are many types of fishes that make up the marine species. So in this list, these are the aquatic creatures that are not fishes. So, these are the aquatic animals that are not fishes. Anything form, cnidarians, echinoderms, and aquatic mammals. Fishes are vertebrates and some of the animals in this lists are invertebrates. Take a look below for our list of 10 sea creatures that are not fish.

1. Sea Star

Also known as Starfish. It is under echidnoderms. They are invertebrates. Echidnoderms are recognizable for it’s radical symmetric shapes and for it spikes.

2. Jellyfish

One of the most misleading sea creature ever. Despite of its name, Jellyfishes are not fish. Jellyfish is a medusa under the phylum Cnidaria. Also an invertebrate animal.

3. Dolphin

These are the one of the sea mammals. Dolphins are under the class Mammalia. Which means that they are not fishes.

4. Octopus

Octopus are cephalopods. They are under the phylum Mollusc. Just same with squids and shellfish. Mollusks are invertebrates.

5. Sea Urchin

Just the same phylum with Starfish. Under the phylum Echidnodermata.

6. Crabs

Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting “tail”, usually entirely hidden under the thorax.

7. Shrimp

They are under Arthropods since they are crustaceans. Just same with the crabs.

8. Squid

They are cephalopods. Under the mollusks. They have the same classifications with octopus.

9. Corals

Corals are under the phylum Cnidaria just the same with Jellyfishes. They are invertebrate animals. They look like plants but they are animals.

10. Clams

They are bivalve mollusks. They are one of the shellfishes. Shellfish are not fish. They are invertebrates.

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