We have just returned from holiday and have discovered an unusual looking creature living in our 70L aquarium, which holds live plants. The main thing that we find unusual is that the creature is living above the water line (not below). It also appears to be eating algea that appears above the water line. I have included a photograph of the creature.
http://img254.imageshack.us/img254/8600/1000352vn1.jpg
Any help will be greatly appreciated. Thanx.