Coconut Octopus
Amphioctopus marginatus
Sighting evidence at Kumomi, Izu Peninsula
Coconut octopuses at Kumomi exhibit one of the most sophisticated tool-use behaviours documented in invertebrates, collecting discarded bivalve shells and coconut husks and carrying them for later use as portable shelters. They are highly intelligent foragers, and their den locations — marked by shell middens — can be tracked reliably across multiple dive sessions.
Evidence at this site
No confirmed records on file at this site
Coconut Octopus is listed as a curated species here based on historical reports.