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Which species are in Class Osteichthyes?

Which species is the most abundant vertebrate on earth?

Which of the following species are marine mammals?

Which of the following is not part of the theory of ocean formation?

Which of the following species are cetaceans?

Under what condition would our ocean waters increase in their salinity content?

Which zone is the intertidal zone?

Where did the salt in the ocean originate from?

The shelf break is indicated by which letter?