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Isopod in a Glass Home

An isopod stands on top of a glass sponge, extending its legs to find zooplankton.
© John Weller
An isopod stands on top of a glass sponge, extending its legs to find zooplankton. This delicate sponge is small, but some glass sponges can grow to the size of a 50-gallon drum and live for centuries if undisturbed.
Tags: Antarctic