The study of organisms that dwell in the ocean or brackish waters.

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Best tail for swimming?

I understand that the vertical tails of fish and the horizontal flukes of cetaceans evolved due to the spinal movements of their ancestors but I was just wondering which was the most efficient for ...
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Neuston vs pleuston

I was recently reading about the wonderful chondrophores, and came across the terms "neuston" and "pleuston". According to Wikipedia, "neuston" are "the organisms that float on the top of water ... ...
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Can immortality of the Turritopsis dohrnii be learned or adapted by other species?

I have heard that Turritopsis dohrnii is a species of jelly fish which is immortal, as it can grow old and then back to growing young. So, how is it possible? Can other species (marine and/or land) ...
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Where should one start if they want to go about identifying phytoplankton and dinoflagellates?

I'm a first year university student and I really need help on how to identify and recognize the different organisms observed in my water samples. Are there any good references/tips on how to?