Hi Csababubbles I have a Lactoria cornuta/ Longhorn Cowfish I have had it since it was a grape in size. If you decide to get one this small you need a slow current tank as they will get stuck to power heads or any strong flow device, This species grows real large Mine is now 4~5" after having for almost 4 years they get along with Wrasses,Tangs,clowns,Mine has over this time taken one bite out of a toad stool and a yellow leather coral. It has left LPS alone and Anomes alone.
Would not trust it with clamsThey have a great Personality about them they always watch you this one would require a large tank over time. Mine is in a 150 gallon Reef It is my Wife's personal baby I have to watch as it likes to bite me when ever I am working in the tank! This one Eats Nori,Scallops, Mysis shrimp and big prepaired foods
Lastly here is some eye shots
Hope this helps...Jeff
I installed a remote 20 gallon nano tank tied to the sump on my 150 In this tank I have small gobies and some pistol shrimp I put it in this tank till it increased it size to about 1 1/2"
This tank had no power heads in it, All flow was thru lock line fittings they are pretty slow growers so If you have a smaller tank you will have 1-2 years before upgrading to the 125 tank
Good luck...Jeff