Oh, if I just tickled someones fancy, there is this cute anime called Orenchi no Furo Jijou with 5 minutes episodes...
i find this one interesting
http://www.mangago.me/read-manga/mister_mermaid/
now if you like supernatural more of the side of demons/vampires i know quite a lot
They have wings but aren't angels exactly
http://www.mangago.me/read-manga/white_black/
http://www.mangago.me/read-manga/mauri_to_ryuu/
http://www.mangago.me/read-manga/akuma_no_himitsu/
http://www.mangago.me/read-manga/maou_no_amai_keiyaku/
http://www.mangago.me/read-manga/suzume_favorite/
http://www.mangago.me/read-manga/zhen/
Just saw one of those inspiring pics and thought: Hm, a shounen ai/yaoi with a merman would be nice... So does anyone now of a readable one? Either way I feel like reading something supernatural, does anyone mabe know something with an angel/winged guy?