marine animal
marine creature
sea animal
sea creature

They are marine creatures especially common around the 30th parallel north.

Above all, how could marine creatures ever develop a technology without the aid of fire?

Part of the answer can be found in modern bottom-dwelling marine creatures like rays.

I could see ancient marine creatures pressed into the surface, a tiny fossil museum at my feet.

It fed on fish and other small marine creatures.

When the aquarium opened it contained 6,500 marine creatures of 180 different species.

"For the first time, man might become a truly marine creature!"

No, the things you really need to worry about are the marine creatures.

He has his own royal court and commands an army comprising various marine creatures.

These marine creatures disguise themselves as fishermen asking for help.