stomatopod
noun
sto·mato·pod stō-ˈma-tə-ˌpäd 
: any of an order (Stomatopoda) of marine crustaceans (such as a squilla) that have gills on the abdominal appendages
stomatopod adjective
Word History
Etymology
New Latin Stomatopoda, from stomat- + Greek pod-, pous foot — more at foot
First Known Use
1877, in the meaning defined above