Mud Centiworm

The mud centiworm split from its ancestor, the slithering centiworm. Some stayed at the river and scavenged for food as well as eating other rotten organic materials. Its coloring is now brown to match the color of the mud at the bottom of the very muddy river. Its head is now flat and wide and its four toothed mandibles now sit at the bottom of the head - one pair close to the mouth and the other pair to scoop in food. It has regained its ability to breathe underwater with gills behind its head. These are very resilient since they have to filter out the very muddy water. It no longer comes to land because it cannot breath outside the water. Its three primitive eyes are only used when it can see through the muddy water. Otherwise it relies on touch to navigate through murky waters.

During the rainy season the mud centiworms gather in mass at the junction of Nuke and Terra rivers to breed. It takes three sexes to complete the reproduction process: one sperm, one egg and one hormone cell. They release the eggs into the mud, which then hatch within a few days before the rainy season is over.