u/SitOnMyLap

I've had these two Hillstream loaches for over a year and this is the first time I've seen them do this. Usually they're doing their own thing and might try to flee eachother off when it's feeding time, but for the last couple days these two have been glued to each constantly circling. I would think this is mating behavior but I haven't had hillstream loaches in the past, and just wondering if it could be something else? Any responses appreciated!