Vicious deep series

As Kurt and Tristan battle for the Sea King's throne, sea witch Nieve kidnaps Layla and raises an army of mutant sea creature to overthrow the crown.

Teenaged merman Tristan battles pirates, sea dragons, and mutant creatures of the deep in his quest for the Sea Throne.

Tristan Hart is washed ashore after three days of being lost at sea and has no memory of what caused his accident, but begins to remember images of a silver mermaid with razor-sharp teeth.