Definition: Cacconaster is a type of small, crustacean that belongs to the phylum Chordata and order Nematoda. These creatures are known for their ability to reproduce sexually in a group called gametophytes, which can be either female or male. Cacconasters have two sets of eyes: one located at the base of the head, and the other on the side that projects from the head. They are found primarily in freshwater environments such as streams, rivers