So I got this guy maybe 6 weeks ago, and he's done well since day one. One day I walk in though and find him apparently napping. I thought he was a goner, but there was gill movement, and very slight fin movement. 10-15 minutes later he wakes up and was fine. I've observed this behavior one other time since. He found a spot on the tank deco to settle into, so he was more upright, but his body was fully supported while napping. Is this a common thing? "Dude, your fish is dead. Nah, he's just happing."