Genus of Gram-positive, mostly rod-shaped, bacteria including both free-living and pathogenic species.

Quiet, often stagnant body of water connected to a larger body but held back in some way, e.g. by a naturally-occurring dam or tide.

Large group of prokaryotic microorganisms representing one of the three domains of living organisms. Present in the majority of Earth's habitats as well as organic matter and the bodies of live animals. Most are harmless, some beneficial and others pathogenic.

An agent with the ability to destroy bacteria.

Type of shutoff valve comprising a free-floating ball with a cylindrical-shaped hole in it that sits in a concave-shaped depression over an opening.

Used in ichthyology to describe a vertical or diagonal marking, normally with well-defined margins, often located on the flank of a fish.

In zoology, used to refer to a small spine projecting from a larger one; alternative name for spinule and, sometimes, barbel. Also used to refer to cyprinid fishes of the genera Barbus, Puntius, Systomus and related species.

A slender, whiskerlike, external process on the jaw or other part of the head of certain fishes used for touch and taste. Also used to refer to European members of the cyprinid genus Barbus.

At, towards or constituting a base; primitive. Opposite of derived. In cladistics, used to in reference to a clade within which other clades are nested.

The bottom or lowest part of something. Biology. The point of attachment of a part or organ, e.g., a fin. Chemistry. A substance that can accept protons or donate pairs of electrons. The chemical opposite of an acid. Bases have a pH greater than 7.0 and a solution containing one or more bases is often referred […]

Of, being, or relating to a median ventral cartilage or bony element located at the ventral point of a branchial arch, behind the tongue if the latter is present.

Teeth on the median ventral plate (base of the tongue) overlying the basibranchial bones between the gill arches in some fishes.

Of, relating to, forming, or being a base.

At or on the base of the caudal fin.

Being a base, or the extent to which a substance is basic.

Used to denote a region drained by a single river system, e.g., the Amazon basin.

Basal bone or cartilage located at the base of the paired fins in some fishes.

The number of eggs released by a serial spawner during a single spawning event.

A fish species which deposite eggs on more than a single occasion throughout a particular spawning season rather than within a short period.

A form of protective mimicry whereby a harmless species closely resembles an unpalatable or harmful species thus reducing the potential of predation.