scubaseason

Velvet Swimming Crab

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Sighting evidence at Dunstaffnage Wall, Oban

Velvet swimming crabs are the most aggressive crustacean in Scottish waters, raising their claws and facing divers directly when approached rather than retreating. Their paddle-shaped rear legs allow rapid bursts of swimming when threatened or hunting. Night dives at Dunstaffnage reveal these crabs actively pursuing prey across open substrate, their red eyes reflecting torch light from surprising distances.

Evidence at this site

No confirmed records on file at this site

Velvet Swimming Crab 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