Today at the beach I saw a Polycheate, a bristle worm. I did not touch it, luckily, as many of these marine animals are venomous.

it's the purple and red worm looking thing with a hundred legs. It moved quite fast when my shadow crossed it. ( it was so brightly coloured irl, really pretty even if it was a monster )

I also saw a sea urchin in a rock pool, it was moving it's spines.

and a cloudy day over the bay, I dressed warmly and the breeze was quite nice