I pretty much agree with Sarg. Getting someone to serve you here can be hard as it's usually busy when I go & most don't have much knowledge about marine I'm afraid.
This shop does often have a coral bargain bin which is good and if you are prepared to take a gamble, it's worth checking out. Last time I was there I picked up 2 "bargain bin packs".
Pack 1 $16:
A red tree sponge that looked good but wasn't fixed to anything.
A purplish mushroom about the size of a 20c coin. Turned out to be a ric.
Last in this pack was a small branching rock with bright green zoas on one branch (under normal light) and a different colour on the other branch.
Pack 2 $18:
A species of Gionopora (yellow/green) about tennis ball size, no polyps extended.
A colony of pretty white star polyps.
A toxic green lobo that was slightly receding but has since tripled in size in 3 months so it must have been very closed in on itself. It's now about 12cm long.
Easy parking but be warned there are big steps to navigate & no hand rail. Difficult if you are carrying large purchases or have mobility issues.