BIOLOGY: So, eyes-
FEATHER-DUSTER WORM: Yup just grab a bunch and slap them bad boys all over your tentacles next question
Feather duster worms are wary of shadowy figures looking to steal their crown. Myriad eyespots play lookout to alert the worm to danger. Should an intruder be spotted, the tentacles can be retracted into their protective tube in the blink of an eye!