Fossil hunting in Wales

Algae at the high tide line on rocks on the shore at Traethllyfyn Ynys Barri, St Davids, Dyffed, Wales

Abereiddi, in Pembrokeshire, is famous for its graptolite fossils.

These are the remains of colonies of tiny animals that lived in the sea from 470 million years ago. 
They look like tiny hacksaw blades or tuning forks - look for them in the rocks and among the beach pebbles.