He was spastic while catching him both at the store and when I got him out of the bucket after drip acclimation, but healthy. He's currently sifting sand a bit here and there but in between he raises up and inch or so and looks to be taking BIG breaths with his mouth open. Then back down, sometimes he'll repeat, sometimes he sifts more sand. He's not breathing quickly or going to the top of the tank. Just opening his mouth really wide and raising up an inch, then back down. Is this normal?