Knob or comb like projections on the front edge of the gill arch. They serve to protect and clean the gill filaments.
anterior projections on gill arches for food capture
a series of tooth-like bony structures placed along the anterior edge of the gill arches
the part of the sharks mouth that filters out plankton
A series of bony projections attached to the inside of the gill arches, used to strain food from the water.
Gill rakers are bristly structures (the bristles are about 4 inches or 10 cm long) in a filter-feeding shark's mouth that catch plankton which the shark then swallows.