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Misumena vatia
A pale or yellow crab spider can be hard to pick out against a flower of the same shade. Follow the edges of the bloom for long sideways legs that don’t line up with the petals. The central body still looks like part of the flower from a few steps away.
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Renilla
Across its flat, purplish disk are many little white polyps. Each has its own tentacles, so the colony resembles several small blossoms on one surface. The lower side anchors the colony in soft seabed.
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Sabella pavonina
A circle of delicate branches fans out from the tube like a translucent bloom. The whole crown belongs to one animal, and those thin branches can disappear into the tube. Watch the base to see where the petal-like fringe starts.
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Stichodactyla haddoni
Hundreds of very short tentacles cover a broad, rippled disk close to the sand. From above it looks like a large flat flower whose edges bend independently. The center of the disk is clearer when the folds relax.
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Metacrinus rotundus
At the top of a slender stalk, this sea lily spreads feathered arms in a circle. The feathery crown catches food carried by the current and gives the animal its flower name. A close view shows it belongs with sea stars and feather stars.
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Corynactis viridis
Jewel anemones can spread over a rocky face like a bed of little blooms. Each individual has a disk in the middle and a ring of tentacles ending in rounded tips. Look for the separate mouths to tell how many animals are there.
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Sabellastarte spectabilis
This tropical feather duster worm opens a crown of striped branches at one end of its tube. The pale and dark bands repeat around the crown like patterned petals. It can pull the entire fan inside.
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Tubularia indivisa
A group of oaten pipe hydroids produces thin stems topped with pinkish polyps. The ring of tentacles around each polyp is most recognizable when the colony is open in moving water. The stems stay anchored to the surface beneath them.
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