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Zebra Urchin Crab

Zebrida adamsii


This is a commensal crab, living on the highly poisonous Fire Urchin (Asthenosoma varium). It is also referred to as Adam's Urchin Crab and Fire Urchin Crab. They feed on plankton, and grow to a length of about 2cm.


Found singly or in pairs on coral and rocky reefs, living with short spined sea urchins. Widespread in the West Pacific region, at depths of 5 to 15m.


I spotted this critter during a day dive at a depth of about 40 feet. It was a pair of them on a fire urchin. Dive site: Dayang Beach, Talikud Island, Davao.

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AlisoViejo8040 4 years ago


Blogie 7 years ago

Thanks, Samantha & Leuba. It's my pleasure entirely. :)

Leuba Ridgway
Leuba Ridgway 7 years ago

I don't think I'd get to see anything this wonderful and in such great detail, in a million years so, Blogie, thanks so much for sharing and congratulations -you deserve it !.

SamanthaCraven 7 years ago


Gerardo Aizpuru
Gerardo Aizpuru 7 years ago

Thanks to you we are happy you do.

Blogie 7 years ago

Thanks very much, guys! I'm just happy I can share my underwater experiences here. :)

Bong Ambutong
Bong Ambutong 7 years ago

Congrats Blogie....

craigwilliams 7 years ago

Nice one! Thanks

Wild Things
Wild Things 7 years ago

Congrats Blogie.

Mark Ridgway
Mark Ridgway 7 years ago

Blow me away Blogie !
Incredible series - thanks.

KatCuff 7 years ago

Great series!

KarenL 7 years ago

Great spot!

Sachin Zaveri
Sachin Zaveri 7 years ago

Congratulations Blogie,

Nicholas4 7 years ago

Told you so Brother!

ShaumingLo 7 years ago

Waoo Blogie, looks like i have to change my camera , hehehehe Congrats Buddy!

Maria dB
Maria dB 7 years ago


aldrin 7 years ago

Congrats!!! : ) payter. nindot!.. : )

Gerardo Aizpuru
Gerardo Aizpuru 7 years ago

Congratulations Blogie
Well done amazing.

peter 7 years ago

What an amazing organism. Congrats on Spotting of the Day!

"The Zebra Urchin Crab feels right at home living on a highly poisonous Fire Urchin. They are called 'commensals' because they live on different living organisms without harming them."

Facebook: http://facebook.com/photo.php?fbid=10151...
Twitter: http://twitter.com/projectnoah/status/16...

Blogie 7 years ago

Wow! Thanks very much for your truly encouraging words, Nicholas!

Nicholas4 7 years ago

What an incredibly beautiful series of photos you have captured and shered with us!! Amazing, blazing colors and patterns.. This should be considered the spotting of the day, week and month. Definitely a National Geographic photo candidate!
Many Thanks!!

Blogie 7 years ago

Thanks, Gerardo! I have good mentors here. :)

Gerardo Aizpuru
Gerardo Aizpuru 7 years ago

Wow Blogie
you are the Macro men
Wonderful shots

Spotted by

Davao del Norte, Philippines

Lat: 6.95, Long: 125.67

Spotted on Jan 7, 2012
Submitted on Jan 19, 2012

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