Spotfin do not prefer a pond habitat, but can adapt to it. If you construct spawning structures for them to spawn in, they'll keep their numbers up better. Suitable spawning sights are an issue in ponds for spotfins. They are crevice spanners. In rivers, currents help keep the crevices in rocks, logs, etc from filling in. In ponds, these crevices get silted in and this becomes a limiting factor in their success.
