There are more than 52,000 species of Crustaceans in the world which include popular marine animals like lobsters, crabs, shrimp, crayfish and barnacles. Smaller crustacean breathe through their bodies and larger ones breathe through gills.
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Cymothoa exigua will make you feel very glad you're not a fish.
These brightly colored crustaceans can smash aquarium glass or quickly cut through a human finger, so whatever you do, keep your distance.
The first-ever deep-sea exploration of West Java seas netted more than 12,000 marine creatures, including some new species of crabs, prawns and lobsters.
By Oisin Curran
Scientists have discovered for the first time that animals pollinate flowers in the ocean.
By Alia Hoyt