过去曾有研究对宇航员赖以生存的动物蛋白质——例如家禽、鱼类、甚至海胆幼虫——进行过评估。
Past research into what animal protein astronauts might live on has assessed poultry, fish, and even sea urchin larvae.
体长最多可达5英尺(1.5米)的狼鱼有着明显的齿系以适应由裹着硬壳的软体动物，蟹类以及海胆组成的食谱。
Reaching 5 feet (1.5 meters) long, wolffish have conspicuous dentition suited to a diet of hard-shelled mollusks, crabs, and sea urchins.
虽然它们通常被称为海星，这些动物不是鱼，它们是棘皮动物，与海胆密切相关。
Though they are commonly called starfish, these animals are not fish at all. They are echinoderms, closely related to sea urchins.
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