Gastrotrich

A microscopic aquatic invertebrate in the phylum Gastrotricha, typically bearing adhesive tubes and rows of cilia on its underside.

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Gastrotricha: A phylum of microscopic aquatic invertebrates with ciliated undersides and adhesive tubes. This phylum groups the animal’s two major lineages and defines its broader classification.
Gastrotrich feeding: The ingestion of bacteria, algae, detritus, and other small food by gastrotrichs. Feeding explains how gastrotrichs exploit microbial food among sediment grains.
Meiofauna: Small aquatic animals that live between grains of sediment and are commonly defined by size. Gastrotrichs are a widespread component of sediment-dwelling meiofaunal communities.
Rotifer: A microscopic aquatic invertebrate with a ciliated feeding structure called the corona. Rotifers can occupy similar habitats but have a distinct corona and body organization.
Cilia: Short, hairlike cell structures that move fluid or propel cells and organisms. Ventral cilia propel gastrotrichs across sediment and other surfaces.
Gastrotrich reproduction: Reproduction in gastrotrichs, commonly involving hermaphroditism and direct development. Many species mature rapidly and produce eggs without a free-swimming larva.
Freshwater ecology: The study of interactions among organisms and their physical environment in inland waters. Freshwater gastrotrichs inhabit sediments, plant surfaces, and other aquatic microhabitats.
Nematode: A slender, unsegmented worm with a complete digestive tract and a molting cuticle. Nematodes share sediment habitats but move and feed without gastrotrich-style ventral ciliary bands.
Adhesive tube: A tubular structure that secretes adhesive material for temporary attachment. Gastrotrich adhesive tubes anchor the animal and help it resist currents.
Hermaphroditism: A reproductive condition in which an individual has both male and female reproductive functions. Hermaphroditic reproduction is characteristic of many gastrotrichs, though details vary among groups.