• It is a crustacean.

• Found in fresh water bodies and brackish water habitats.

• Body – elongated and pear shaped.

• Body divisible into Cephalothorax and abdomen.

• Cephalic region – 6 segments,

Thorax – 7 segments

Abdomen – 3 segments.

• In female, body has 3 regions – Cephalothorax, Metasome and Urosome.

• Cephalothorax bears a median dorsal eye, ventral mouth and cephalic and thoracic appendages.

• Abdomen is apodous, last abdominal segment bears a pair of plumose caudal style.

• Female is larger than male.