[2][3] Adults grow to less than 5 cm (2.0 in) long, and are transparent except for some orange pigmentation on the eyestalks.

[4] Marsh grass shrimp have been investigated for their maneuverability and swimming.

They also modulate the profile area of their appendages to create net thrust.

Through Particle Image Velocimetry, two drag-reducing mechanisms have been identified in marsh shrimp swimming that enable them to reduce drag during the return stroke of their beat.

The first of those mechanisms is asymmetric flexibility, with the appendages staying mostly rigid during the power stroke and being flexible during the return stroke, this results in a reduced wake.