Yes, they are nocturnal. This is especially true due to the fact that Axolotl (commonly known the Mexican salamander) geographically thrive in a very sunny region. There have been numerous studies that indicate salamanders survive best in very dark environments within streams or bodies of water.

Without a doubt this decribes perfectly the Axolotl species, considering they are neotenic salamanders. Neotonic means that they never leave water due to the fact they stop developing beyond the juvenile stage. Since Axolotl live in water for a life time, it is most certain that they are a species of salamander that is nocturnal.

An Axolotl, also known as a Mexican Walking fish, is an amphibian that can be found in high altitude, fresh water lakes in Mexico, such as Lake Xochimilco. Originally, these creatures were native to Lake Xochimilco and Lake Chalco, but because of flooding issues, Lake Chalco had to be drained and does not exist anymore.

Yes, stingrays do, in fact, have teeth! Stingray teeth are small and flat. They are attached to the jaw by a structure which is called a tooth band. The tooth band holds all of the stingray’s teeth. A stingray employs these teeth to crush and grind crustaceans. The tooth bands line the upper and lower jaw and the stingray uses both bands to crush prey.

Divers occasionally find stingray teeth, mixed in with shark teeth, resting on the ocean floor. Crustaceans can have very hard shells, so occasionally the stingray will lose a tooth. Stingray teeth are replaceable in a similar manner to sharks teeth. New teeth are grown on the backside of the tooth band and will push forward to replace missing teeth. It takes a lot of work to crush a crustacean and a the jaw plates of a stingray are very strong.

A stingrays mouth is only visible from underneath. Inside the frown-like mouth lies the strong jaws and rows of teeth which rest on the tooth bands. So, while we cannot usually see them, it is true that stingrays do have teeth.