when i feed mine its tentacles fold in and all u see is the body. when he is expelling dirty water his mouth wiill be inverted/puffing out. first had him in 75gal with 260pc
moved to 55gal with the 260pc the upgrade to 2 175mh 10k 2 96 actinic pc now back to 260pc he touches front and back of tank of the 55gal when extended. ya powerhead made his close read they needed high flow but mine hates it.