The use of the hammer during feeding by a Great Hammerhead Shark. A 3 m long hammerhead captured and consumed a l m wide Southern
Stingray by knocking it to the bottom with its hammer and then using the hammer to hold the ray against the bottom while the shark pivoted
around and fed on the front margins of the pectoral fins. The following sequence is shown: 1, shark chases the ray; 2, shark strikes downward
across the back of the ray with the flat underside of its hammer; 3, ray bounces off the bottom from the force of the blow while the shark brakes
with its pectoral fins; 4, shark delivers a second downward blow across the back of the ray; 5, shark pivots while holding the ray against the
bottom and takes a bite from the front of the left pectoral fin; 6, injured ray attempts to swim off followed by the shark. From Strong et al. (1990);
used with permission