What's the deal with your nickname? How did you get it? If your nickname is self-explanatory, then tell everyone when you first started using the internet, and what was the first thing that made you say "wow, this isn't just a place for freaks after all?" Was it a website? Was it an email from a long-lost friend? Go on, spill it.
I've been using this nick since the mid-90s... almost to the point where I can't remember where it comes from :-) The Clever Shark was a one-time (I think) skit character on Saturday Night Live. It knocked on people's doors pretending to be many things (candygram, flowers delivery, pizza guy, dolphin) and ate the people who opened the door.

Here's Kogepan, one of many cute San-X characters. Those are kind of like the Hello Kitty characters, if they had a litany of social and psychological problems.