Scuba Season
Data Deficient· population decreasing· assessed 2018

Giant grouper

Epinephelus lanceolatus

Sighting evidence at Kanton Atoll Wall

Giant grouper

Photo: Ian Banks · CC BY-NC

The largest bony fish inhabiting coral reefs, giant grouper can exceed 2.7 metres and 400 kg. Apex ambush predators, they swallow prey whole including small sharks and rays. Largely absent from fished reefs, their presence at PIPA is a direct indicator of effective marine protection.

Evidence at this site

No confirmed records on file at this site

Giant grouper is listed as a curated species here based on historical reports.

How is this calculated?

Sighting evidence is compiled from iNaturalist observation records within a set proximity radius, filtered for quality-grade observations. “Last confirmed” is the date of the most recent research-grade record. Record count covers a rolling 24-month window. Confidence reflects record count, recency, and consistency of seasonal signal.

Also seen at other sites