This year, I have greatly enjoyed getting acquainted with some North American Native fish (NANF) suitable for home aquaria.
In one 29 gallon aquarium, I have found what seems to be a good harmony between three species:
(1) Notropis Chrosomus — Rainbow Shiners (14x)
(2) Enneacanthus obesus — Banded Sunfish (2x)
(3) Etheostoma caeruleum — Rainbow Darters (4x)
Here is a video showing the Shiners in breeding colors. Notice a Darter appears in bottom left, and Sunfish in bottom right (a second sunfish bottom left)…
Very impressive. The Darters are really interesting. Whats their behavior been like? Any agression?