Facts about Groupers

1. 07

   Cleaning symbiosis allows small wrasse and other fish to enter grouper mouths without being eaten, removing parasites and dead tissue in a mutually beneficial relationship.

   GroupersMay 14sharebehaviorsymbiosisecology
2. 06

   Goliath groupers in the Atlantic can live over 50 years, with some individuals reaching sexual maturity only after 5 to 6 years of age.

   GroupersMay 14sharebiologylifespanreproduction
3. 05

   Certain grouper species can alter their coloration in under one second, shifting between dark and light patterns to communicate with other groupers or camouflage themselves from predators.

   GroupersMay 14sharebiologybehavioradaptation
4. 04

   Groupers possess a specialized pharyngeal jaw system that allows them to rapidly expand their mouth cavity and create suction to capture prey from distances up to one body length away.

   GroupersMay 14sharebiologyanatomypredation
5. 03

   Spawning aggregations of Nassau groupers off the Bahamas declined by 99 percent between the 1980s and 2000s due to overfishing of predictable breeding sites.

   GroupersMay 14shareconservationpopulationbehavior
6. 02

   Groupers change sex from female to male, with dominant males in a group triggering the transformation in the largest females through social hierarchy signals.

   GroupersMay 14sharebiologyreproductionbehavior
7. 01

   The giant grouper can reach lengths of 2.5 meters and weigh over 400 kilograms, making it one of the largest reef fish species in the world.

   GroupersMay 14sharebiologymeasurementmarine