Some unknown Anime uw screenshots

I discovered a Japanese person who shares underwater screenshots from Anime shows on Twitter:

This is the link to the account: https://twitter.com/umi_uwg

The thing is; there are these stuff out there that seem unknown to me. So I'll just put these screenshots here in case anyone has an idea where they are from so I can go fetch these scenes. Some might already have been uploaded on the channel, feel free to remind me.