• Question from:Isaac

Hello again.

I have always wondered about those two appendages that resemble antennae on the head of Pikaia. What were they, and what purpose did they serve?

Thank you,
Isaac.

Photo
  • Natural History Museum, London, UK
  • Posts: 113

Strictly speaking the answer is "we don't know", but I think the most common explanation is that they are analogous to the tentacles of hagfishes, which are used as sensory organs.