Salt Bog Bowlwhorl

As Ichthy Marsh changed over the millenniums into a less pleasant salt bog the ichthy river netwhorl gradually adjusted and evolved into the salt bog bowlwhorl, the new specie effectively replacing its ancestor. The most obvious difference between the salt bog bowlwhorl is how the filterfeeding nets have merged into one big net, with the limbs evolving to six stronger ones. This happened due to the new, more effective way of moving around. This allows the bowlwhorl to more effectively compete with the ichthypede as a filterfeeder. The movement cycle of the bowlwhorl consists of first the limbs closing with the net in between them, pushing itself forward, and then quickly open the limbs to filter the water through the net. This makes it jet forward in a jerking manner. The effectiveness of this allowed it to greatly increase in size, something which made it even a stronger competitor of the ichthypede. The new method of locomotion has rendered the flagellum unnecessary, and therefor made it devolve. In order to cope with the salty water the bowlwhorl has evolved a way to filter out the salt of the water it drinks. The salt ions are released through pores on the body of the bowlwhorl. Some of these ions form microscopic salt crystals which cake up in a characteristic manner.