Starfish appendages are incredibly versatile, and are usually referred to as arms or rays. Different species can have different numbers of arms.
I knew starfish grew legs but never knew legs grew starfish : r/Aquariums
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Study finds starfish shed arms to protect against overheating
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7 Facts About Sea Stars That Are Out of This World - Ocean Conservancy
This is the labidiaster annulatus starfish, they can grow up to 50 arms.
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Sea stars are able to regenerate limbs, and in some cases, entire bodies. Some require the central body to be intact to regenerate, but a few species can grow an entirely new
Starfish Everything You Need To Know - Tynemouth Aquarium
Starfish sacrifice arms to beat the heat
Cocktopus': Australia's 'penis starfish' goes viral
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