Karl Urban and the voice cast of “The Sea Beast” are treading into unknown waters in the brand new teaser for the upcoming Netflix animated film.In the clip, released on Wednesday, Urban voices monster hunter Jacob Holland. In an era when terrifying beasts roamed the seas, monster hunters were celebrated heroes — and none were more beloved than Holland, per a logline from Netflix.But when young Maisie Brumble (voiced by Zaris-Angel Hator) stows away on his fabled ship, he’s saddled with an unexpected ally.