1) Arthropod family 2) Family cancridae 
Cancridae is a family of crabs. It comprises six extant genera, and eleven exclusively fossil genera, in two subfamilies: Cancrinae Latreille, 1802 †Lobocarcininae Beurlen, 1930 Until 2000, the extant species were all classified in genus Cancer. After an analysis of new fossil material, the subgenera were elevated to the rank of genus, and three...
[n] - many of the best known edible crabs
family Cancridae noun many of the best known edible crabs