Goliath grouper: Protected. Illegal to Fish since 1990. is the largest of the NW Atlantic groupers. This giant can reach 800lb, > 8ft long. Vulnerable to overfishing b/c of slow growth, long life (50-100yrs), late sexual maturity (5-6yr old), strong site fidelity & the formation of spawning aggregations. Also vulnerable to cold temps & red tide. When not feeding/spawning, solitary, sedentary and territorial. Calico crabs make up the majority of their diet.