Results for “od”

axil

The upper angle between a fin and the body of a fish, most often used in reference to the pectoral fin.

axillary process

A modified, often elongate, scale or group of scales located at the base of the pectoral or ventral fins in some fishes.

Bacillus

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

backwater

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.

Used in 88 profiles

bacteria

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.

Used in 14 profiles

batch spawner

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

baytril

Fluoroquinolone antibiotic effective against many aerobic bacteria, but particularly gram-negative and mycoplasma forms. Produced and marketed for veterinary use and used to treat fishes in some cases.

beel

Term used in India and Bangladesh to describe a low lying, water-filled depression on a floodplain, sometimes becoming dessicated during the dry season. Also spelled 'bheel'.

Used in 4 profiles

benthic

Inhabiting or relating to the bottom of a body of water, e.g., a benthic organism.

Used in 250 profiles

benthopelagic

Used in reference to fish species living or feeding at or near the bottom of a water body. Some of these may also do so in the midwater or surface levels.

Used in 1 profile

benthos

Organisms existing in, on or near the bottom of a water body. Sometimes used to refer to the bottom itself.

Betadine

Brand name for a range of antiseptics containing povidone-idodine sometimes used to treat ornamental fishes.

biological species concept

Most popular concept of species in vertebrate zoology. Defines species as members of populations that do or potentially could interbreed and produce fertile offspring in nature, regardless of appearance, therefore somewhat more restrictive than the phylogenetic species concept. In theory species are thus separated from one another by some form of reproductive isolation, though in practice this does not always hold true. Often abbreviated to BSC.

breeding cycle

In fishes, the period of time between hatching and first spawning within a particular generataion.

Used in 3 profiles

breeding line

A group of identical, pure-breeding diploid or polyploid organisms, distinguished from others of the same species by a unique phenotype and genotype. Important in production of line breeding ornamental fish strains.

breeding tubercle

Raised, epidermal structures developing on the head, body or fin rays during the spawning season in some fishes. Usually occur only in males, and sometimes referred to as 'nuptial tubercules'.

C number

Coding system used to organise and refer to unidentified catfishes, though not necessarily undescribed or distinct species, of the genus Corydoras. Works in tandem with the similar CW number system. The system was invented by German aquarist Hans-Georg Evers and first appeared in the magazine 'DATZ' but is now in popular use worldwide.

Used in 67 profiles

cartilage

Specialised, toughened, elastic, fibrous connective tissue found in various parts of the body and forming the temporary skeleton in embryonic and very young fishes, but mostly lost as the majority of species mature. Retained throughout life in cartilaginous fishes.

Used in 26 profiles

caudal peduncle

The typically narrow section of the body located between the posterior of the dorsal and anal fins and caudal fin origin. Its depth is measured vertically at the narrowest point.

Used in 394 profiles