1) Animal order 2) Order branchiura 
Branchiura is a group of crustaceans ranked as a subclass of the class Maxillopoda. It comprises the fish lice of the family Argulidae, and the prehistoric Cyclida (`cycloids`). ...
• (n. pl.) A group of Entomostraca, with suctorial mouths, including species parasitic on fishes, as the carp lice (Argulus).
Bran'chi·u'ra noun plural [ New Latin , from , Greek ... gill + ... tail.] (Zoology) A group of Entomostraca, with suctorial mouths, including species parasitic on fishes, as the carp lice ( Argulus ). 
[n] - copepods with suctorial mouthparts
order Branchiura noun copepods with suctorial mouthparts; parasitic on fishes