Pretty normal I'd say. I've had one that does this every night for over a year. He's always out scanning the whole tank for food, pumps, rocks, glass, overflow, everything... He is always back under the rocks by morning though. Funny to see in the night... He is at least 16 inches around!!!
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-Mike (Tank Info / Links / Pics shown below)
120G Reef with 2x250W MH lighting
My old 33G Reef with 192W PC lighting
Live Rock - These tanks have some purchased liverock, but mostly home made live rock
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