• Ectoparasite crustacean living on marine fishes.

• It is attached to the gill of the host.

• Body is elongated, divisible head, thorax and abdomen.

• Carapace is absent.

• Head bears paired antennules, antennae and sessile compound eyes.

• Cephalic appendages seen around the mouth are modified as sucking organs.

• The last abdominal segment is large and shield like and it bears a pair of broad swimming legs.

• It is a protandric hermaphrodite.