Description:
Nemertopsis bivittata is an armed (stylet-bearing) nemertean that achieves an adult size of approximately 6 - 9 inches.  Body color is generally brown to olive, with a single white stripe mid-dorsally.  There are 4 eyespots on the head. 

Habitat:
This predatory worm is common in mussel beds where it typically feeds on crustaceans and perhaps other worms.  It is common in the Indian River Lagoon

Range:
This species is known to occur from Ft. Pierce Inlet south to Miami.