1: [Young]
Young Thrumbles begin humming and thrumming as a form of self-comfort. They quickly learn to hone their vocal ability, and become popular among other monster youngsters by using their stretchy necks to scout for new places to play.
2: [Adult]
A full-sized Thrumble is often mistaken for a ferocious sea monster. The only thing to be afraid of though, is getting accidentally splashed by its gentle but clumsy feet.
3: [Prismatic]
This Thrumble returned from the Prism Gate forever changed! Gone are its trademark long, stretchy neck and beady eyes, replaced at the molecular level by a mysterious void which seemingly still connects the head to the lower body - extraordinary!