Latreilliidae is a small family of crabs.
They are relatively small, long-legged crabs found on soft bottoms at depths of up 700 metres (2,300 ft) in mostly tropical and subtemperate waters around the world.
Top image is of Eplumula australiensis via Rob Stewart, NIWA, Ocean Survey 20/20 Bay of Islands Coastal Biodiversity, Sediment and Seabed Habitat Project.
Bottom image is of Eplumula phalangium via Wikimedia Commons.
Via Wikipedia.