WordNet sense 1 ((football) the person who plays center on the line of scrimmage and snaps the ball to the quarterback):

center

WordNet sense 2 (a party favor consisting of a paper roll (usually containing candy or a small favor) that pops when pulled at both ends):

cracker, cracker bonbon

WordNet sense 3 (Australian food fish having a pinkish body with blue spots):

Chrysophrys auratus

WordNet sense 4 (large-headed turtle with powerful hooked jaws found in or near water; prone to bite):

common snapping turtle, Chelydra serpentina