PROFILE PICTURES

This might seem like a weird topic, but I'm posting it anyway. We have all these forum profile pics to choose from. They're all related to Halo in some way. And then there's an eel. An eel. Why? Can someone explain this to me? Is there some kind of joke I don't understand? This kinda confuses me.


Any help appreciated.
Thanks!

I didn't find the right solution from the Internet.

reference:
talkforum.co.uk/viewtopic.php/454584
Medical Device Animation