Why aren't there super-large sea creatures?

There ARE super large sea creatures precisely BECAUSE of the lack of gravitational effects when living in water compared to land. This is also why you can have situations where cartilage type structures are just fine and dense bone not needed so much as on land. As to why they aren't even bigger... well... life is smart... read more

In fact, in addition to blue whales, the overwhelming majority of “super large” creatures are in fact sea creatures. Due to the physical differences of existing in a liquid environment as opposed to gaseous air, creatures can get much, much larger. read more

Biologists still aren’t certain why some abyssal creatures grow to such immense sizes, but they have some good theories. You’d think that if anything, deep sea pressure would keep animals smaller, and not larger, but the water pressure isn’t much of an issue, because the creatures are mostly water themselves, and water is not very compressible. read more

there are sea anemones, worms, fish, whales, seals, crabs, and thousands of other sea creatures that seem to handle the pressure without a second thought. While this seems impossible, remember that pressure is all about balance. read more