2 invert questions

One about a clam and the other about a nem. Please answer 1 or both if you can. Got both of these off of a reefer that was taking down their tank and didn't have much info on them.

First, the clam. Would like an ID, I think its a derasa, not positive. But the question is, is the clam open fully in this pic or should it be open further (sign of a problem)?

Second, the nem. I have it under 110w 10K & 110w 12K VHO, 2x65w 6700K pc and 2x30w actinic. The question is why is it hiding behind a rock mostly out of the light? He seems happy and moved himself there. Pretty green abd "bubbly" under actinic and moonlights and he ate a piece of squid today, seems weird to me.

thanks.

I can offer an answer/opinion on the bubble nem ^_^

So in my experience, and from what I've read of others, nems will do their own thing, and that often involves wedging themselves between some rocks in a place you can hardly see it. It's thoroughly annoying, especially if you spend a pretty penny on it so you can stare at it all day >.<

Nems will move to where they are most comfortable. I have known some people whose bubbles have done what yours did, then moved after a few days/weeks after it became thoroughly acclimated and happy in its new environment.

You never know, it may very well move. I suggest you just leave it be, though, and let it do its own thing.

Are they more sensitive to light or flow? Wonder if it moved down there to get away from flow since i put it front and center.

Originally Posted by primo21

Are they more sensitive to light or flow? Wonder if it moved down there to get away from flow since i put it front and center.

I believe- and someone correct me if I am wrong- that nems prefer low light and low flow when FIRST introduced to the tank. Once they've adjusted, they'll find the perfect spot for them.

Yes thats a Derasa and it doesn't look to be fully open but i wouldnt worry about that just yet. If you just moved it into your tank then it can take a while for it to adjust to everything.

I wouldnt worry about the nem either. They will walk all over the place until they find the spot for them.

Thanks all. I'll let you know if they come out of their shell.

That is a derasa, it looks a little closed, but not too bad. The nem looks bleached though, it will probably need brighter lights, and consistent feedings. Nems are kinda dumb, they don't always do what's best for them.

It is a T. derasa, is not fully open, but appears healthy.

The anemone, on the other hand, looks severely bleached. As for it hiding, they'll do that. They like to anchor their foot under a rock, and stretch out from there, to get to the light. This way, at night, they're protected, under the rock. Give it plenty of light. It'll hide from the light if it's too much, so don't worry about that. I'd also attempt to feed it, about once or twice a week, for awhile, only since it's bleached. Make sure the food is not too large.

Do derasa's ususally attach? This one ends up on its side every night. Probably knocked over my my goby or hermits.

Yes, they will usually attach, until they reach a certain size. Once large enough, they usually dissolve their bysal threads, as they are no longer needed.

Clams commonly end up sideways, due to their own movement. Mine do it all the time! Grrr

every small clam will want to attach to something - i like to put little half steamer clam shells under mine, its just big enough for their feet to stick too, yet small enough it makes them easy to move around my tank

otherwise, they will attach to rubble, or even your glass down under the sand!

Originally Posted by primo21

Do derasa's ususally attach? This one ends up on its side every night. Probably knocked over my my goby or hermits.

Make a little dent in the sand and place the clam in it.

Did that. Sort of wiggled him down about a 1/2" or so. I will try a little deeper, just didn't want to cover any of the opening for the mantle.