Ventral Fins: Paired fins on the lower part of the fish, located below the gill covers. Not all fish have these.
Ventral: On the bottom or underside area of a fish.
Ventral Fins - Pelvic Fins. The most posterior (toward the rear of the fish) set of paired fins on the underside of the fish.
Venturi - A simple device for introducing a gas, e.g. air or CO2, into a water stream in a pipe. ...
Ventral fins Alternative name for pelvic fins.
Encyclopedia 1.0 by Rebecca Smallwood
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GENDER: The ventral fins of the male are deep red to the margins, the upper snout is reddish, the dorsal fin is edged with vivid red, the female is fuller, with duller colouring and ventral fins transparent on the margins.
The female cups her ventral fins and lays a few eggs (normally about) 4 in them. She now starts cleaning a spot on the glass to lays her eggs on. Corydoras are egg scatterers and lay their eggs all over the aquarium.
The ventral fins are filamentous and the anal fin is runs from just beyond the ventral fins nearly to the fan-shaped caudal fin.
All goldfish must have two eyes, two ventral fins, two pectoral fins and two anal fins. I know a few of you think it is OK to have only one anal fm.
The ventral fins are threadlike and extremely sensitive. This fish has a labyrinth organ, a part of the fish which allows it to absorb atmospheric oxygen directly into the bloodstream.
They have black ventral fins and lack the colororation of the males as well. It was hard to sex them until they were the age shown in the pictures. Kathy On Fri, 27 Nov 1998, Susanne and Cory Williamson wrote: > Does anyone have pictures of adult A.
The dorsal fins are black and there is black coloring in the dorsal and ventral fins. Electric Yellows are not as aggressive as other African Cichlids, which makes them a good starter cichlid.
Females have orange-red ventral fins and are slightly smaller than males, which usually have a yellowish lower body colour and bluish ventral fins. This species is a protogynous sequential hermaphrodite, at least in captivity.
Sexing: When mature, male tiger barbs will show bright red noses, his dorsal fin will have a red line above the mainly black fin and his ventral fins will turn bright red.
The ventral fins are described as being inserted behind the dorsal fin. The adipose fin is present and is relatively short. This catfish has 4 pairs of barbels; one pair nasal, one pair maxillary and two pairs mandibular.
The ventral fins are also red in hue and can be tipped in White. The females are considerably duller with shorter rounded fins and only the side bars are well defined.
Maintenance: The Paradise fish is fairy easy to keep.
They are a slow moving, slim, flat and extremely graceful fish that resemble an elongated ray when they swim due to the outstretched pectoral and ventral fins.
The body is stretched out and laterally compressed with ventral fins that are long and thin, having the look of feelers. It is covered with iridescent pearl and brown flecks that give it a mother-of-pearl appearance.
Plakats can often be mistaken for female Bettas to the untrained eye, however, males will display elongated ventral fins, a rounded caudal fin and a sharply pointed anal fin. The term Plakat is often abbreviated to "PK".
Blue Discus have saber shaped, blue ventral fins, which are black at the edges, and caudal fins that are notched. In color, Blue Discus are usually pale blue or brownish. Usually older fish have more blue coloration.
Sex differences: Males exhibit bright orange/yellow coloration with elongated ventral fins tipped with yellow lapets. A characteristic large, elongated black nose will appear on the adult males.
The ventral fins are small, the dorsal and anal fins being long-based and composed of soft rays. The fish possess an accessory breathing organ which helps enable them to survive for long periods of time while out of water if necessary.
Females have less intense colouration and clear ventral fins.
Breeding
An egg scatterer - provide spawning mops or fine leaved plants. Remove the adults after spawning to prevent the eggs being eaten. Eggs hatch in about 3-5 days.
The ventral fins are long and thin, having the appearance of feelers. The mouth is small and upturned. Pearl and brown flecks covering the body give it a mother of pearl appearance, from which is derives it's name.
She will pull her ventral fins or feelers close to the lower sides of her abdomen and her anal fin will be situated so that her entire lower line is relatively straight.
The ventral fins are orange to red, while the anal fin is is bluish with a white to orange edging. The caudal fin is dull orange, and the dorsal fin is also dull orange. The iris of the eye may be orange.
The male tends to have longer ventral fins and longer spikes at the front of the dorsal fin. The males also have brighter coloration overall.
Description: See drawing, ventral fins are bright red, which the drawing doesn't show.
The female will carry the eggs to their final destination by using a special pouch located under her ventral fins. The eggs are then attached to a plant leaf or other smooth surface.
Another finage feature that many males exhibit are long flowing ventral fins. These fins which are attached on the lower front part of the body, and in some species they will grow to great lengths.
For the youngsters, the sexual difference isn`t obvious, but for the mature fish it is. For mails, the superior part of the mouth is red; same are the ventral fins and the first rays of the tail lobes.
His long, pointed ventral fins were bright blue-white. His head was bright green-blue with a black band running from eye to eye through the lips. There were several other black lines and blotches all over the head and body.
Description: See picture, similar to Aphyocharax_anisitsi, but lacking the red color in the anal and ventral fins.
Many of them tend to be a bit timid, though, suffering infections when more aggressive breeds bully them around or nip at their elongated ventral fins.
Sex can easily be determined by looking at the anal fin (the unpaired fin under the fishes belly). Females have a normal fan-shaped fin (similar to the two ventral fins nearby), while males have a rod-shaped organ that points straight back.
 See also: Ventral, Fish, Water, Aquarium, Species
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