Because countless ecological opportunities remained for fish underwater, plenty of them remained aquatic.

因为海底的生态环境仍然为水族提供了无尽的生存机会，所以很多鱼仍然是水栖动物。

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The nocturnal animals hide in underwater caves by day, then venture out at night, feeding on small fish, squid, and octopus.

这种夜行性动物白天时隐藏在水底洞穴里，晚上才出来冒险，它们以小鱼、乌贼和章鱼为食。

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Not everyone can swim with fish in the ocean. But they can enjoy underwater life in another way — by visiting an aquarium.

并不是每个人都能在海洋中与鱼一起游泳的，但人们以另外一种方式享受水下的生活——参观水族馆。

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Goudey, the director of the MIT Sea Grant's Offshore Aquaculture Engineering Center, has devised a system by which giant spherical cages of fish would drift underwater in circular ocean currents, or gyres.

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Fish that actually belonged underwater.

BBC: The end of a wandering way of life?

This Five-Star resort is tucked away on seven oceanfront acres on the southern tip of Palm Beach Island, and the Ritz Kids AquaNuts facility is decidedly ocean-inspired the ceiling is blue and the room is decked out with fish nets, crab and fish rugs and has large murals of underwater scenes on the wall.

FORBES: Five Luxury Hotels That Know How To Keep Kids Entertained