Crabs
From tiny porcelain crabs hiding in anemones to large spider crabs on night dives, crabs are everywhere if you know where to look. Check crevices, sponges, and coral heads — they're masters of tucking themselves away.
Last updated April 2026
Crab5 photos
A general term for the many crab species divers encounter — from tiny decorator crabs covered in sponges to larger spider crabs. Hard exoskeleton with pincers.
Hides in crevices during the day, more active at night — look closely at sponges and coral for tiny, perfectly camouflaged decorator crabs.
© Jouni Kuisma
© Jouni Kuisma
© Jouni Kuisma
© Jouni Kuisma
© Jouni Kuisma
Harlequin crabLissocarcinus laevis2 photos
© Jouni Kuisma
© Jouni Kuisma
Observed at
Every dive has a story. Share yours.
Log your dives - notes, photos, conditions and the marine life you saw - and share them as one public diver profile. What you share helps the next diver, too.
Log every detail
Depth, duration, conditions, gear, buddy, notes — all in one place. Import from Suunto and other dive computers.
Track marine life
Record species sightings on each dive. Build a personal catalogue of everything you've seen underwater.
Your public dive profile
Share your dive history, stats, and experiences with a profile page you control. Show the world where you've been.