Fosalgeara rubrensis
Members of Fosalgeara ivorae living further from hydrothermal vents had to gain nutrients from other sources and began feeding on whatever nutrients they could find. Over time they began extracting nutrients from carcasses in their area, particularly Marcobrachium casperpygmeus.
These members led to Fosalgeara rubrensis which has adapted to predate M. casperpygmeus. They grow much shorter than F. ivorae. The bioluminescent parts only grow at the bottom of the organism and have started glowing red. The top of the organism started producing a viscous adhesive fluid. The red light tricks members of M. casperpygmeus into approaching, expecting a mate, but they get stuck on the adhesive fluid and remain there until the die, once they've died F. rubrensis begins to digest the nutritious parts of the body and leaves the exoskeleton and other hardened parts behind. They reproduce by fragmentation.