I also just bought a crocea, mine opened right up. I had it at the bottom on top of shell and it attached itself within 4-5 days. However, I just moved it higher in the tank. I know from what many people have said in the clam threads, that my lighting may not be high enough, but we will see. So far, he seems to be doing fine.
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Equipment: 55 gal, Remora Skimmer w/ maxi jet 1200 pump, 4x54w T5 lighting, 2 super actinics, 2 12,000K actinic white bulbs, 55+ lbs fiji live rock... Inhabitants: Ocellaris Clownfish, Yellow Tailed Damsel, Six Line Wrasse, Yellow Watchman Goby, 3 Chromis, Crocea Clam, Skunk Cleaner Shrimp Corals: Zoas, Yellow Fiji Leather, Pineapple Brain, Frogspawn, Pearl Bubble, Blastomussa Merleti, Monti, GSP, Green Psammacora |