For the Critically Endangered sand tiger shark, mandatory release only reduced fishing deaths by about 1.5 times—not enough to prevent continued population decline. However, some good news emerged.

Catch and release fishing affects the internal temperature of the predators, which could impact their physiology and behavior. Stock image of a great white shark lunging for fishing bait.

A mako shark jumped onto a fishing boat off the coast of Maine. ... They mostly encounter blue sharks, but on this August day, 15 to 20 miles out to sea, it was a 7-foot mako.

A mako shark jumped onto a fishing boat off the coast of Maine. ... They mostly encounter blue sharks, but on this August day, 15 to 20 miles out to sea, it was a 7-foot mako.