Color of living specimens pale red or translucent pink. Integument of carapace finely pitted with minute sharp, elongated scales. Antennal spine almost reaches distal margin of eyes. Eyestalk free, not fused.
Eyes are triangular in shape with pigment dispersed as irregular black stains .
Rostrum does not extend over eyes. Telson marginal spines are absent. Calliasmata bears a superficial resemblance to the genus Yagerocaris , represented by one species from Cozumel, Mexico. Within the genus, it closely resembles C. rimolii Chace, 1975. Found in total darkness below the halocline.