Visual effects

How about adding some Geico-like manatees with t shirts in the underwater tube?

That would be a complete waste of coding resources.  A better use of their time would be to add a function that when someone enters the underwater tubes obviously zwoping (Zwift doping), a shark breaks the acrylic wall and devours the rider, leaving only a mangled bike to remind others not to do it.  Or add mermaids and mer-men. But instead of human upper bodies, make the upper bodies fish and the lower bodies cyclist legs.  That wouldn’t be too creepy.

i just like the use of the term Zwoping.  Kudos…like the shark police idea too