ROBERT DUNNE / SCIENCE PHOTO LIBRARY ROBERT DUNNE / SCIENCE PHOTO LIBRARY
Daisy brittle star. The daisy brittle star (Ophiopholis aculeata) lives on rocky sea floors from north-eastern Canada as far south as the north-eastern USA. It is primarily a scavenger, feeding on detritus on the seabed, although bivalve molluscs may be taken also. Its arms may reach a length of up to eight centimetres. Unlike other echinoderms, brittle stars move using their entire arms rather than their countless tube feet (not seen). They are known to drop a limb if it is damaged or held (a process which gave them their name). Lost limbs are regenerated. They have long life spans, some reaching over 20 years old. Photographed in Muscongus Bay, Maine, USA.
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