This crustacean is known from southern California, USA, to Ecuador and Peru.
In adults, the head is somewhat immersed in the first thoracic segment.
It parasitizes the mouths or gill chambers of fishes.
In adults, the abdomen is not immersed in the thorax.
In adults, the uropods are not visible from above, typically lying concealed under the tail plate without extending beyond its rear margin.
An extinction-risk assessment has not been added yet.