Bloodbrother (Starfinder)

Bloodbrother from the Starfinder Alien Archive 1.

Here a short description from the books :
'Measuring over 15 feet tall and 11 feet long, a bloodbrother looks like a millipede or some other armored, wormlike arthropod from the waist down. Its upper half resembles that of a muscular humanoid with a set of bony appendages protruding from a cavity in its chest. This ersatz rib cage can open like a fanged mouth, and when a bloodbrother places captured prey within it, the bones clamp down on the