Portal:Arthropods/Did you know/33

... that the gooseneck barnacle Pollicipes polymerus (several pictured) will become sterile if there are no others within 20 cm (8 in)?
... that in 1781 both a Danish zoologist and a Swedish naturalist described the transverse ladybird?
... that the clawless lobster Tricarina is known from a single fossil, obtained from an oil well 3,852 m (12,638 ft) below ground in western Iran?
... that Japanese skeleton shrimp are invading the coastlines of North America, Europe, and New Zealand?
... that the crab Dyspanopeus sayi may have lived in the Venetian Lagoon for 15 years before it was discovered?
... that Polybius henslowii has more swimming legs than other swimming crabs?