Dorsal fin Single fin mounted on top of the fish. Some species have two, one behind the other.
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Endcap A water resistant socket for fluorescent lamps.
Dorsal Fin: The dorsal fin is the uppermost fin, located between the body and the tail.
dorsal fin - The fin directly on the top of the body (it's the fin that sticks out of the water when you see a shark). Some fish have two dorsal fins one directly behind the other.
Dorsal Fin: Single fin mounted on top of the fish. located between the head and the tail. Some species have two, one behind the other.
Dorsal Surface: The top part of the fish.
Dorsal Fin: The fin located on top of a fish. Most fish species have only one dorsal fin, but some will have two, one behind the other. Many species of clownfish will have two dorsal fins.
Dorsal Fin - The fin at the top of many fish. In many species of fish (such as cichlids) is distinctly separated into a spiny front portion followed by a "soft" rear portion.
Driftwood - Wood that has been drifting or floating in water.
Dorsal Fin
The fin present on the dorsal side (the back / top) of the fish. In species with an adipose fin, it refers to the fin(s) in front of the adipose fin.
Dorsal fin Single fin mounted vertically on top of the fish; some species have two dorsal fins, one behind the other Many marine species have venomous rays in the dorsal fin, so handle them with care.
Encyclopedia 1.0 by Rebecca Smallwood ...
Dorsal fin. Lends stability in swimming.
Ventral fin. Serves to provide stability in swimming.
Caudal fin. In most fish, the Caudal or tail fin is the main propelling fin.
Dorsal Fin - The fin located on top of the fish, some fish have two dorsal fins.
Dosing Pump - A device used to inject small amounts of chemicals and trace elements in to the aquarium water.
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The dorsal fin base is very long and is not preceded by a fin spine. The dorsal fin may or may not be continuous with the caudal fin, which is rounded. Pectoral and pelvic fins are variously absent in some species.
The dorsal fin of mature males is slightly longer than females, and the latter is rounder in appearance. Fairly easy to spawn, and like most characins it is an egg scatterer.
The dorsal fin of the male is more pointed, and the anal fin has a toothed edge.
Breeding
Unlikely in aquaria ...
Male dorsal fins are black and white Males also have a black patch on the front part of their body. Female have a red dorsal fin.
Male's dorsal fin size and shape:
Name a species with a similar fin shape.
Is it high or low?
Does it have any extended spines?
Is the back tip extended (at least as far back as mid-caudal)?
Is the top edge even (like A. agassizii)?
The first dorsal fin of Eschmeyer's scorpionfish is sail-like, with no or very reduced incisions between the dorsal spines.
The single dorsal fin is located on the back of the fish and serves to help balance the fish while swimming. The rays of this fin are often sharp, and a spine is often present.
Shows a black dorsal fin extension from about the 40mm size onwards. Sadly an artificially developed ''balloon'' form has been introduced into the hobby perhaps to combat the fishes large adult size.
Sexing
No recorded visible sexual differences.
A spine before dorsal fin. Dorsal soft rays usually 6 or 7.
Sometimes known as the Asian bumblebee catfish. Older specimens tend to lose the distinguishing coloration, the white no longer sharply contrasted against the black.
The high raised dorsal fin of the male Apistogramma cf. pertensis is the most diagnostic feature of the species. Here a male displays to a receptive female. There are a number of different recognized forms of A.
In addition to the dorsal fin differences, certain species of Gourami show color variations between the sexes. The male Pearl Gourami has a deep red-orange coloration on the throat and breast.
Sex differences: Females are less colorful then males and their dorsal fins are rounded whereas the male Dwarf Gourami has pointed dorsal fins.
Ruby Barbs
Ruby Barbs are very active and occupy the whole tank area, top middle and bottom.
Description: The body of the Auratus or Golden Mbuna is elongated with a rounded snout, narrow mouth, and continuous dorsal fin. In coloring, the male has a much different appearance than the female.
The dorsal fin is equal or bigger than the anal fin. The first ray of the pectorals fin is very prolonged, sometimes it`s even forked. The middle, superior or inferior rays of the caudal fin can also be very prolonged.
A characteristic may be the color of the dorsal fin, the final size, everything that characterizes the fish (genotype). Genotype could be described as all the characteristics described (contained) in a fish's genome - the inherited information.
The scientific name "caeruleus" means blue and refers to the fact that the black streak along the top of the dorsal fin turns blue on males during breeding. Most Labidochromis caeruleus are yellow, however some specimens are white or light blue.
Mature males have a first dorsal fin that is fan shaped, while the second dorsal fin has exceptionally long filaments. The anal fin is similarly extended. This elegant finnage is used in a remarkably vivacious display for females and rival males.
An order that includes a lot of different fishes that possess a modified dorsal fin. The first spine on the dorsal fin is modified into a movable "lure". The fish then remains motionless attracting prey by fishing with the lure.
Breeding A female Salvini Cichlid is usually distinguished by a dark spot located on her gill covers or a dark patch on her dorsal fin, while males normally have more pointed tips to their anal and dorsal fins and brighter coloration.
And the dorsal fin is long and floats through the water like the tail of a common Crowntail Betta. Both the tail fin and the dorsal fin have matching yellow/green/black dotted patterns. This male is being bred to similar looking females.
Barbonymus schwanenfeldii can be distinguished from other closely related Barbonymus species by its red dorsal fin with a black blotch at the tip, red pectoral, pelvic and anal fins, ...
decorus is very attractive in markings and is well known among Synodontis enthusiasts by the long, flowing dorsal fin extension which develops as the fish begins to mature. The fin extension can reach almost to the tail on some specimens.
Pufferfish generally exhibit a torpedo-shaped body with a somewhat anteriorly placed dorsal fin containing 7-18 soft rays. The anal fin is situated ventrally, in line with the dorsal fin and containing approximately 7-18 soft rays.
When well over 1", the males will show an extension of the first three rays on the dorsal fin and will be larger than all other fish in the tank. A sure fire way of sexing your Rams is to check the black blotch in the fish's side.
The base color will be faint yellow with a darker brown, or black lateral line from nose to the end of the dorsal fin. The fins will usually be darker yellow with black markings.
It has a very tall sail-like dorsal fin with black bands and speckling on a white body. Be wary, this fish has the potential to get VERY large and need exceptional housing, beyond the means of the average fishkeeper.
The best way to differentiate between the male and female Opaline Gourami is by the dorsal fin. In the male, the dorsal fin is long and pointed, while the female's is shorter and rounded.
Males are much more colorful with a pointed first dorsal fin.
Frequent water changes and live foods will bring out the best colors in both male and females.
Salt - a teaspoon per gallon of water would be appreciated by your dwarf rainbows.
Another key is to look at the dorsal fin of young adult and adult fish. In males, the dorsal fin is often only raised when displaying, and while lying against the body it often reaches to or past the base of the caudal.
Pterophyllum is derived from the Greek word for "winged leaf" and scalare means "like a flight of stairs" in reference to the dorsal fin. It is a Latin word that can also mean "ladder".
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.
Besides the difference in color, the sex can be determined by the dorsal fin. The male's dorsal fin is pointed, while the female's is rounded.
Breeding: They are easy to sex, The dorsal fin of the male is long and flowing. It is also more pointed and is sickle shaped. The female becomes full bodied while the male remains more slender.
The distance between the dorsal fin and the tail should be 1/3 the distance between the head and the first ray of the dorsal fin. The head should be smooth, with no pits or indentations.
Ocellatus male and female can easily be told apart by the white edging on the end of the dorsal fin and along the anal fin. Males have no dorsal fin edge coloration or some gold at the beginning of the dorsal and colorless at the back of the dorsal.
Description:Similar to Corydoras ornatus, but the dark pigment continues up into the dorsal fin. Furthermore only 3-5 irregular bars in the caudal fin are present in Corydoras schwartzi.
The red-tailed shark has a deep black body, white-tipped sharklike dorsal fins, and, of course, a bright red tail. However, this fish doesn't usually show its true colors in dealers' tanks.
In addition some fish such as piranhas and tetras possess a 'second' dorsal fin. This is known as the 'adipose fin', and it can be a small singular structure (as in characins) or a more elaborate one (as in some catfishes).
They also have a black spot on the front of the dorsal fin. Although the Royal Gramma can reach 5 inches in the wild it usually only reaches about 3 inches in captivity.
Additional: The fish in the picture shows a shorter dorsal fin than other fish I've seen from pictures. Baensch and Riehl report another poecilocharax species, Poelicocharax bovalli, Eigenmann, 1909.
Weak swimmers with no dorsal fin. The eyes in these fish face upwards towards the sky - hence their name. Each eye is surrounded by a fluid-filled sac. Feed surface floating foods.
Fish Books ...
Concave
curved inwards (hollowed) usually used in reference to the edge of dorsal fin or top of fish's head.
Convex
curved outwards (arched) usually used in reference to edge of dorsal fin or the top of fish's head.
GENDER: The male is more robust, his dorsal fin is extended into a point.
BREEDING RATIO: 1 Male : 1 Female
BREEDING WATER: 24-26C (76-80F); pH of 7.0; dCH max. 2 ...
The dorsal fins of males are typically black. All Bleeding Heart Tetras are silvery in color, with a bright red spot where one would imagine the fish's heart to be.
The Sulfur Crested Cichlid deep golden color over the head and dorsal fin stands out among the blues of the Ice Blue Cichlids, and Dolphin Cichlids.
Tetras can be distinguished from other fish by their small adipose fin on their back between their dorsal fin and their caudal fin (tail). They also have a long anal fin.
A Short Guide to Keeping Tetras ...
Like all livebearers, molly males are distinguishable by their gonopodium. The male sailfin molly has a well-developed dorsal fin that he uses to catch the attention of the female.
Platy
and Swordtail ...
Red spots, gold spots, and common plecos are some of the most popular in the hobby. They are often called sailfin plecos due to their very large dorsal fins.
Puffers curl their caudal fin (tail) up against their body. Butterfly fish only erect their dorsal fins when alarmed. This is normal. If in doubt, call us! We'll be happy to give you advice at any time.
Yellow with black stripes, a yellow with a horizontal black stripe and a fully yellow one but I think when it grows it's dorsal fin turns kind of black. Like i said they are very small and I hope to see them grow hopefully all of them.
 See also: Dorsal, Fish, Water, Aquarium, Species
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