Tiny squid that bury in sand by day and glow at night. Hawaiian bobtails host bioluminescent bacteria for invisibility.
Bobtail squid are tiny round-bodied cephalopods, only a few centimetres long, more egg-shaped than torpedo-shaped. By day they bury in sand with only the eyes exposed; by night they emerge to hunt small crustaceans.
Their famous biology: most species cultivate bioluminescent bacteria (Vibrio fischeri) in a light organ on the underside. The light cancels their silhouette against moonlight from below, counter-shading by glow. The Hawaiian bobtail squid is one of the most-studied symbiosis models in microbiology.
Reliable at Lembeh, Anilao, Bali (Secret Bay), Andaman muck sites. Night dives are essential, daytime encounters are impossible. Local guides know specific patches with resident populations.
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This species hasn't been logged at any of our partner sites yet, destination + season data will appear here once we've confirmed a reliable spot.
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