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]