What is an annelid (Palola viridis) which, at certain seasons of the year, swarms at the surface of the sea about some of the Pcific Islands, where it is collected for food called?

palola — An annelid (Palola viridis) which, at certain seasons of the year, swarms at the surface of the sea about some of the Pcific Islands, where it is collected for food. (Webster's 1913.)

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