Branch­ing out

World of Animals - - Super Seniors -

Af­ter fix­ing it­self to a hard sur­face, the plan­ula meta­mor­phoses into a polyp. This stalk-like struc­ture has a mouth at the top sur­rounded by ten­ta­cles that cap­ture pass­ing plank­ton. Over time, new polyps form on branches off a cen­tral trunk, cre­at­ing a colony.

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