here are my proposals for you. I made the dolphin combined with wave line forming a love shape. I think this symbol will works well to convey connectivity between dolphin and human. The audience will recognize immediately the message by just looking the logo. Let me know what you think. If you need to see any changes, please don't hesitate to ask. I'll do my best for you.
I like your idea. and looks very cute. Japanese girls loves cute kind and seems you know it. I think #30 is too light. maybe #28 color is better... I like #31 and #28. Can you make it a little bit more cuter?
apologize for the delay. Thanks so much for put me at the 1st rank. I really glad that you like the idea. I've made several versions with more cuter looks. Let me know what you think. I'm ready to do any revisions as much as you need.