''Sphaeroma quadridentatum'', the sea pill bug, is a species of

isopod Isopoda is an order of crustaceans that includes woodlice and their relatives. Isopods live in the sea, in fresh water, or on land. All have rigid, segmented exoskeletons, two pairs of antennae, seven pairs of jointed limbs on the thorax, an ...

in the family

Sphaeromatidae Sphaeromatidae (marine pillbug family) is a family of isopods, often encountered on rocky shores and in shelf waters in temperate zones. The family includes almost 100 genera and 619 known marine species (and about 65 in fresh water). Within the ...

References

External links

* Sphaeromatidae Articles created by Qbugbot Crustaceans described in 1818 {{isopod-stub