Robot Watch has a colourful photo report on one of the more unusual robotics events we've heard of - the Underwater Robot Convention 2007 [PDF], which was held in Tokyo's Tatsumi International Swimming Center earlier this month.

The convention, which regularly moves around Japan, is about both showcasing the latest technology and introducing robots to schoolchildren. As well as getting to see some of the more bizarre automata they're ever likely to set eyes on, kids also had a chance to design their own underwater machines in a drawing competition.

Fishy robots

The grown-ups' competition featured robots in four categories - radio-controlled submersibles, autonomous robots, cable-controlled robots and aqua-bio robots. The latter category was the most visually appealing, featuring machines designed to look like fish, snakes and similar water-going animals.

Highlights of the show were a giant carp robot, a sea snake and an eel with a giant red head, which could propel itself at almost half a metre per second. Don't miss the video of the robotic eel in action right here [WMV].