Aquatic worm

Aquatic worm

Observation - Aquatic worm - UK and Ireland. Description: About 5mm in length, quite a direct and agile mover. It had a round transleceunt head. I could make out what looked like a notochord, it looked a lot like a fossil Pikaia!

About 5mm in length, quite a direct and agile mover. It had a round transleceunt head. I could make out what looked like a notochord, it looked a lot like a fossil Pikaia!