Fish were the inspiration for Ray Troll's witty artworks, which adorned T-shirts in the 1980s. This fascination has taken him deeper into the marine world and its evolution, as shown by the detail of spawning ammonites shown here. Troll is now a celebrity among palaeontologists, and his art has moved from T-shirts to museum exhibitions. Rapture of the Deep: The Art of Ray Troll (University of California Press, $29.95, £18.95) showcases his work.