First Giant grouper (Epinephelus lanceolatus) ever tracked! A 2m beast!

We recently published a scientific paper reporting the first monitoring of movements and residency of a 1.95 m giant grouper in the Chesterfield Islands over almost 3 years.

Figure1 copie

Using a nework of 3 six acoustic receivers deployed along the reef we were able to monitor the residency and site use of this large fish. The fish was only recorded by 3 of the 6 receivers with one of it located inside the lagoon being its home reef where it was caught. However, the fish regularly moved to the nearby passes.

Figure2 copie

The fish showed higher presence between May and July and interestingly was absent between October and December on 2 years (2010 and 2012), likely to move to an unknown spawning site. However, it didn’t move in 2011.


Despite being an emblematic fish, this is the first time this species has been tagged and its movement followed. This study provides the first baseline data on the movement and residency patterns of this species which is important for conservation programs and we suggest that other studies should be conducted in other reef of teh world to better understand the spatial behaviour of such rare and large coral reef predators.

Related published paper can be found at:

Clua E, Chauvet C, Mourier J, Werry JM, Randall JE (2015) Pattern of movements from a home reef in the Chesterfield Islands (Coral sea) by the endangered Giant Grouper, Epinephelus lanceolatus. Aquatic Living Ressources 28: 53-58. PDF icon


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