Stock used:

Mermaid - http://artreferencesource.deviantart.com/art/MordsithCara-Chelsea-Christian-30-Great-Nudes-425004005
Again MordsithCara :)

Man: http://ailinstock.deviantart.com/art/Shipwrecked-20-32764946

Facebook fanpage: https://www.facebook.com/ceciliagf.illustration