Extensor Foot Tendons. In the foot diagram below, the main tendons on the top of the foot are labeled. The group of tendons are called the extensor tendons and are responsible for elevating the toes and flexing the ankle up (dorsiflexion).
Dwarf puffers are quite hardy and will tolerate varying water conditions but obviously will do best, as with any fish, in optimum water conditions. They do best at temperatures of 80/26 degrees with a ph of at least 7.
The coldwater fish most suitable for small tanks are white cloud mountain minnows which can tolerate temperatures down to 12 C. If the water temperature will stay at around 20 C, you could also consider keeping zebra danios, temperate corydoras or some of the small barbs such as cherry barbs.oldfish are the commonest coldwater fish and they are ABSOLUTELY NOT suitable for bowls or small tanks. You need a minimum of 20 gallons for one goldfish with an additional 10 gallons of space required for each additional goldfish.