Common caecilians are found in Central America, South America, Africa, and India.

Caecilians look like worms, eels, or snakes. Caecilians have no tail, and their mouth is recessed under their snout. They have strong jaws and lots and lots of teeth.

Caecilians have no gills, but they have gill slits. The bones in their skulls are fused into what looks like a solid helmet. They use their heads to burrow into leaf litter and the ground.

Males and females look the same. Except for during the mating season, most caecilians are solitary. Caecilians eat insects, worms, and small snakes.