Avemetrus

The Avemetrus is a rare blue-green magical creature that looks like a fish and octopus hybrid. It has the tentacles of a squid emerging from its back and three sharp scaly spikes on its head and neck. It also has two clawed hands, sharp teeth, glowing green eyes, and walks around on its two pointy feet. According to Lao Shi, it is as old as time itself.

It only appears in the episode "Young at Heart" of Season 2 where Jake, Spud and Trixie first encounter it in the Magus Bazaar (more precisely in the flea market). It later reappears in the warehouse district of New York City where Jake and Haley finally defeat it.

Magical Powers
Like most magical creatures, the Avemetrus has super strength and above normal agility. But, its most devastating power is its ability to suck the youth out of other creatures. It can do so by wrapping its tentacles around its targets or simply by touching them with the suckers at their tips. The Avemetrus' tentacles will glow blue when it is transfering its victims youth to himself. The longer it keeps its targets in its grasp, the more youth it sucks out of them. Those who are preyed upon by the Avemetrus will not immediately age; it may take up to a few hours. Thanks to this power, The Avemetrus is able to live for as long as it likes.

In order for the victims to recover their true age, the Avemetrus must be vainquished. Jake manages to do so by forcing the Avemetrus to suck its own youth. Caught in a neverending paradox, it blows up in a puff of smoke, leaving behind pieces of its slimy skin and guts. Its victims will then instantly go back to normal.

Trivia

 * Though the Avemetrus is heavily based on marine animals, it is never seen in water;


 * The Avemetrus is vulnerable to fire;


 * Lao Shi mentions that the Avemetrus is too powerful for him to defeat alone;


 * The Avemetrus is shown to suck the youth of five people: Jake (turning 21), Stacey and Spud (turning 80), Lao Shi (turning somehwere near 100) and Fu Dog (no noticeable difference). Haley also gets affected by the Avemetrus during their final fight, but Jake and her defeat it before any noticeable change in her age can occur;


 * Haley called the Avemetrus a "squidiot";


 * The Avemetrus is sensible to loud noises and will become confused if exposed to too many noises at once;


 * Although octopuses and squids usually have between eight to ten tentacles, the Avemetrus only has five;


 * Like the Avemetrus, the Krylock is another beast that also has to be destroyed in order for the effects of its venom to disappear.