Care and feeding of my new clam - question

[Aquattro]

First, determine if this is a tridacnid clam (corcea, maxima, etc). If it's just a hitchiker clam (little white guy), you won't need to worry too much about it, it's a coin toss whether it will survive long term or not. I suspect it's the latter, live rock doesn't usually come with a free tridacnid clam