Hymenopenaeus doris is a species of prawn in the family Solenoceridae. The species lives in the Eastern Pacific in areas like Mexico, Peru, and Costa Rica, from depths of 549 to 4802 meters.[1]
The defense mechanism of H. doris is to play dead in order to avoid predation; drifting motionless while playing dead, having the name "zombie shrimp". This might also be a way of saving energy, since the depth they live at disallows animals to swim rapidly for long periods of time due to the little oxygen.[2]