not sure if this is normal behavior or not, but my previously nocturnal octopus was just out and about during the day. he seemed to be stalking a peppermint shrimp and was very actively and energetically moving around the tank and in and out of the rockwork. i finally offered him a hermit crab and promptly took it and flashed his "MMMM DELICIOUS FOOD" coloration (a sort of skunk-like pattern) and went to his den. not sure if he was just really hungry or what. he ate a crab last night. any input appreciated!