Didn't spend too long on this on the 2nd day but got the sea and the shells done.
I used stem stitch on the waves because it's my favourite stitch and I had to include it 😂 I used a variegated perlé thread (size 8) that's now looking a bit more green than blue but I'm still quite happy with the result!
For the shells, I was going to do a whipped back stitch but once I had the back stitch done I liked the look so I left it without the whipping. Though I may end up going back on that...