derasa/squamosa

I have a small derasa and i really like it. Very interesting coloration and does not require significant amounts of light so the vho would not be an issue (assuming your tank isn't terribly deep). I have never had a squami so I couldn't say much based on personal experience. Either way you go it is a clam... and, really, what else is better than a clam... (except, perhaps, two clams).
 
i have both and like the large shoots that come off the squamosa. If I had to pic only one it would be the squamosa.
 
Personally, I've always found deresa clams hardier, but that's just my personal experience and doesn't relate to either species as a whole. They are honestly both very hardy clams.

As far as looks I prefer squamosa clams, but again, that's completely subjective. Really you can't go wrong with either route.

Usually, when I come to a crossroad and can't decide which way I prefer, I let the health of the animal be the deciding factor. I.e., pick the healthiest, most colorful individual of either species that you can find. Look for animals that aren't gapping, have good consistent color throughout the entire mantle, no signs of bites, tears or any curled edges. Clams with shells bigger than 2" or so are usually hardier. Also, make sure that you inspect the underside of the animal when it's lifted for any pyramellid snails or other predators. That's a little harder to do on a squamosa because the scutes offer a great place for pests to hide, but still give it a once over. I also prefer that tridacnids are bagged underwater; not a necessity, but a personal preference that has served me well in the past...

Final point; make sure that you purchase from a store that is knowledgable about clams. Ask questions that you know the answer to and ask open ended questions like, "what do I need to know about these clams?". Even if you know the answers already, they can help gauge how much the LFS actually knows about them and how they are caring for the individuals in their systems...

Good Luck! :D
 
<a href=showthread.php?s=&postid=15349496#post15349496 target=_blank>Originally posted</a> by SNAKEMANVET
Do like I did get both,they are very similiar in care.the dersea will not get as big as the squasmosa.
I always thought it was the other way around. I thought the derasa was the second largest after the gigas.
 
darkdruid is right. Both T. squamosa and T. derasa will get big but T. derasa will get bigger faster. T. derasa is the second biggest Trinacda behing T. gigas
 
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