Portal:Arthropods/Did you know/15

... that the mutualism between hermit crabs and the sea anemone Calliactis parasitica (pictured) may require the presence of an octopus?
... that Edward L. Kessel assembled the world's most comprehensive collection of Platypezidae flat-footed flies?
... that in the north, the North American paper wasp Polistes annularis has rust-red markings on a predominantly black thorax, but in the south, the thorax is mostly rust-red with black markings?
... that the California Bay pea crab is one of only two marine crustaceans to be included on the IUCN Red List of endangered species?
... that the ground beetle, Lebia grandis, can eat about 23 eggs or three larvae of the Colorado potato beetle every day?
... that the weevil Hylobius transversovittatus has been introduced into the United States and Canada to help control the invasive wetland plant purple loosestrife?