Least Concern· population trend unknown· assessed 2019

Giant Moray

Gymnothorax javanicus

Sighting evidence at Irabu Blue Cave, Miyako Islands

Giant morays occupy the cave's deeper recesses, threading through crevices in the limestone with their mouths continuously opening and closing to pump water across their gills. They are apex predators within the cave microhabitat, hunting fish and crustaceans at night with exceptional olfactory sensitivity. Individual animals are highly site-faithful and have been observed in the same cave section across multiple years.

Evidence at this site

1 record within 25 km

Confidence: low

Last confirmed Apr 2025

Seasonality

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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.

Giant Moray

Evidence at this site

Seasonality

Also seen at other sites