Just for fun: Lumpsuckers

Lumpsuckers actually are a lot more fun than the name sounds. Why, you can celebrate your children's birthday with these little fish, assuming the party takes place in a salt water aquarium.

Balloon lumpsuckers at the Epson Shinagawa Aqua Stadium in Tokyo, Japan in 2008.

These little round fish have modified pelvic fins that have evolved into adhesive discs that will stick to... well, just about anything.

Toad Lumpsuckers (Eumicrotremus phrynoides - middle two) and Pacific Spiny Lumpsuckers (Eumicrotremus orbis - top and bottom), demonstrating adhesive pelvic discs. Credit: NOAA's Alaska Fisheries Science Center

More on these creatures by Bec Crew at Scientific American Blogs.