Gremlins! What to say...
They're pretty lazy, especially males. The ball attached at the end of their tail can have multiple purposes, depending on how the Gremlin feels.
When swimming and diving (usually for food), the ball has been known to become weightless and act as a buoyancy aid, at other times, when owners have tried to walk their Gremlins for exercise the balls have become heavy and unmovable (resulting in the owner giving up 90% of the time).

Gremlin are breedable, a male and female can breed to produce a litter, with any size nest. Male Gremlins may breed twice a season, females once.

~Artwork by Willow
~Aquatic Breed Shading by PM's Hubby