Givning Mr. Scotty The Betta a mirror for his little bowl constitutes an activity.
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I show Li the "bad fish" on the package of his Hikari pellets. He'll get so mad that he flares, smacks his lips, and will sometimes do a little "dance," swaying back and forth. It's good enrichment.
There's a fake plant with long leaves that he likes to rest on, like a hammock, right below the surface. It's so cute. Right now he's taken to making little frothy bubbles in one corner of his bowl.
I wanna get another one for the other side of my room- they're such buddies!
@little p: Truly. Li's bowl is on a table right between a couch and chair. He will swim over to whichever side is occupied because he's so interested (or hungry...)

he gets a little lion mane of gils- such a tuff guy!!!