This may be too flippant, but I don't think a smallie wants to live with a goldfish.

I only say this because after I stocked those 50 or so larger smallies (I already had smaller classes of SMB), I saw one larger smallie torpedo-ram a bullhead who was trying to eat some of the feed I had thrown out.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."