ID on mobil invert

[tmac1rebok]

I have a clue that this is either a limpet or nudibranch. I need to know if is an algae eater, hopefully not my coral.

 

[Octoshark]

HitchHiker Guide: http://www.chucksaddiction.com/hitchhikers.html (nudis are listed with snails, also may not be listed but worth a shot)

 

[tmac1rebok]

Looked-No luck

 

[iamwhatiam52]

Flatworm.
May prey on mollusks.

 

[tmac1rebok]

flatworms are normally smaller and whitish. This is about an inch normally and can be two inches stretched out

 

[Hephalump]

+1 on Flatworm. Flatworms come in many shapes sizes, and colors.

 

[LeslieH]

The largest flatworm I've seen was about 6" long and it looked about the same. These or something very similar are known to eat molluscs including giant clams.

 

[Elysia]

I'm sort of surprised at how often these flatworms are found in the hobby, considering they are somewhat cryptic. Are they more likely to come in on the live rock that coral is attached to? I would think that they would be prone to desicate on live rock that is harvested as such. Unless the ones found in the US are coming from FL live rock -- I just assumed that these are Pacific based animals.

 

[LeslieH]

A couple of years ago I visited Walt Smith's facility in Fiji. The harvested live rock was brought in by the truck load & stacked in a huge pile. It came from coastal lagoons & shallows that were periodically exposed by low tides & water temperature often went up into the 90s. The rocks are basically dead coral so they're porous & retain a lot of water. The associated animals, as you can imagine, are extremely tough. They stay inside the crevices where it remains damp. As long as the oxygen supply is good many will stay alive for days or even weeks.