chaetodon /kēˈtō-don/ noun

(Gr odous, odontos tooth) any fish of the tropical genus Chaetodon having slender teeth and making up the family Chaetodonˈtidae

chaetognath /kēˈtəg-nath/ noun

(Gr gnathos jaw) a coelomate, wormlike marine invertebrate, including the arrowworm, having bristles round the mouth

chaetopod /kēˈtō-pod/ noun

(Gr pous, podos foot) a worm (such as the earthworm, lobworm, sea-mouse, etc), that moves with the help of bristles