tried this w/ feeder guppies... as said they use a similar system sharks/rays do. nothing is safe... lol but that's the beauty of this fish for us. ours is in a low light planted set-up and he occasionally rearranges but for the most part leaves the décor alone. and idk about calling them "blind" ours certainly sees me since I feed him and my husband usually doesn't he will beg for food from me but not him. their eyesight is undoubtably poor but I wouldn't say they are completely blind.
Every time we've had to cut back on tanks ect... having kids is darn expensive =/ ... we always manage to justify keeping ours and giving up other fish, even though he requires his own tank. imo they are a love/hate species... you either absolutely love keeping them, or absolutely hate keeping them. Kinda like puffers or spiney eels.
