Dromiacea
plural noun
Dro·mi·a·cea
| \ ˌdrōmēˈāsh(ē)ə\
Definition of Dromiacea
: a group of crabs (suborder Brachyura) in which the last pair of thoracic legs are modified, dorsal, and often chelate and are used for placing sponges, shells, and other objects on the carapace
Keep scrolling for more