Once again Darth, thanks!!darth pike;3688418; said:They (and others in their group) actually prefer cooler water than firemouths, 70-74F (21-23C) than those in the firemouth group (Thorichthys is divided into two species groups). While sometimes found in the same rivers, they are usually found either higher up near the headwaters or in the the cooler rapids areas rather than the slower, warm stretches or lagoons.