what is this ?? help pls..

[cyro]

could u give me an information about this hitchhiker pls? looks like pics below. about 6-7 cm diameter.. is it bad ?

 

[Anonymous]

I can't be certain from those pictures but it's a Nudibranch that appears to be a member of the Familyorididae and Genus Rostanga which are specialized porifera (sponge) predators. Where is your rock from?

Regards,
David Mohr

 

[cyro]

thank you very much.
rocks from Turkey and Singapore.
it is like a leaf and very thin with eyes in the middle.
similiar with Polyclad Flatworm in this topic. http://www.reefs.org/phpBB2/viewtopic.p ... =flatworms

what could you say? is it reef safe?

 

[Anonymous]

The texture doesn't look right for a Polycladid, though it's possible it may be one. All Polycladids are carnivorous and are specialized predators, depending on the species they'll prey on dead organisms, sea squirts, worms, crustaceans, corals, snails while others are canabalistic.
Whether it is Polyclad or a Nudibranch unfortunately without their prefered prey they will starve to death.

Regards,
David Mohr

 

[Anonymous]

David has nailed it, I believe.

 

[cyro]

thank you ver much.
the man that i bought the rocks has got 1 also. it is 12 cm. diameter. he doesnt know anything about them. he took out from mediterranean sea.

 

[ReefSanctuary]

looks like a flat worm. definatly not a nudi because no nudi is flat like that