Image: Balanoglossus


"Balanoglossus", genus of marine, wormlike animals of great zoological interest as a possible evolutionary link between invertebrates and vertebrates ( "see "Chordate). The animals live in mud or wet sand in tropical and temperate climates all over the world. Like common earthworms, these acorn worms burrow through their surroundings, ingesting the mud or sand for its organic content. Some species may attain a length of 20 cm (8 in) or more. The body is divided into four distinct regions: a large proboscis in front of the mouth, a muscular collar of some length, a respiratory region with slits through which water flows out from the gullet, and a long gastric region that contains most of the body`s digestive and reproductive systems.

"`Scientific classification:"` The genus

"`Scientific classification:"` The genus "Balanoglossus" belongs to the class Enteropneusta, phylum Hemichordata.

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