It definitely looks more mature/serious. And as all other logos, it´s very cool.

Suggestion: put them for wallpaper download!

One more thought on the subject. In my native language, Spanish, dolphins and sharks are first thought of as males. This is because the noun´s gender is male (nouns and adjectives have gender in Spanish). So you have to specify "a female dolphin". Rays and Orcas, on the other hand, are females (as a whole) and male only if you specify it (because of the same see more reason).
So my question/thought is: Is this dolphin7 a female or a male? I guess I know the answer, but I´d prefer it to be the opposite... ;-)

What do you think?