Scuba Season

Coleman shrimp

Periclimenes colemani

Sighting evidence at Walking Shark Bay, Halmahera

Coleman shrimp

Photo: karinemanko · CC BY-NC

One of the most sought-after macro subjects in the Coral Triangle, Coleman shrimp live exclusively on the toxic fire urchin, where they clear a bare patch of spines to create their territory and feed on the urchin's tube feet. Pairs are always found together: a large female and a smaller male. The fire urchin's toxin deters all but a handful of specialist commensals, creating a microhabitat community that includes several other endemic shrimp species. Finding them requires meticulous searching of fire urchins in the bay's sandy patches.

Evidence at this site

0 records within 25 km

Confidence: low

No date on file
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