I'm getting ready to head to bed me thinks, so I checked in on the admiral. I crouched down by his bowl (it's sitting on a small end table), and he wriggled out of his hiding spot to come say hi. I put my finger against his bowl, and he wiggled some more at me (I may have even seen some gill flaring). I increased the temperature in his bowl a bit more, also. He's now fully emerged from his plant, and hanging out in the middle of his bowl (as opposed to floating more towards the top).