Razorback Musk Turtles

This species, Sternotherus carinatus, is common and widespread in many different habitats - slow and fast-moving bodies of water and ponds and lakes in its natural range. 
It is presumably easily bred in captivity by aquarists judging by the ease with which it is obtainable in pet shops in the UK.

Sexing

The tail of males is longer and thinner than it is in females.  Claws, too.

Veterinary problems.

The most common ones are likely to be trauma from falls due to lack of care and attention when cleaning the aquariam out. In the event of concern, the animal should be taken to the vet as soon as possible.

Razorback Musk Turtle Sternotherus carinatus with red mass projecting from left side of the beak.  This alteration followed a trauma, a fall of over a metre.  The animal was not taken to a veterianrian despite being advised to do so.  The question remains what is the mass that is protruding.