Dorsal hump - A single wart-like structure found on the top of the first abdominal segment. It may be very prominent or appear as only a slight mound. Best seen in side view.
Exoskeleton - The hardened outside body wall of arthropods.
Dorsal Surface: The top part of the fish.
Dorsal Fin: The dorsal fin is the uppermost fin, located between the body and the tail.
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: 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 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: 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
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.
Red-dorsal Afra, Dogtooth Cichlid [picture]
Cynotilapia afra
SYN: Chromis afra
PD: The body is elongated and the forehead is steep. Males are usually dark turquoise blue with six to seven navy blue bands.
[edit] Dorsal
This is the spine or the fin on the top of the fish connected to the spine. The fin comes in a vast array of shapes and sizes.
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 view showing 'anchor' shape.
Hara jerdoni is one of the most easily recognisable members of the genus Hara, and one that is quite readily available in our stores.
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.
E ...
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 and caudal fins of the male are noticeably longer and more pointed than the female. Also quite noticeable in the male, is an extended ray in the middle of the caudal fin that gives the tail the appearance of a trident.
The dorsal and anal fins of the male are slightly longer and more pointed, but this is not a reliable guide, especially in young fish. Males are generally larger in a spawning pair.
Breeding ...
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.
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.
Their dorsal and anal fins continue all the way back to it's yellow tail and they're trimmed in a black edging. They have thin bodies and are generally oval shaped.
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.
Of a stronger dorsal framework, and with the same extension to the caudal, we have Synodontis nigrita (in particular those seen as Synodontis sp. 'Zaire'), again widely bred in Eastern Europe and often seen in the U.K.
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.
The spines on the dorsal, pelvic, and anal fins are venomous. If you are stung, the reaction will be similar to a bee sting only a little stronger.
Sexual dimorphism: Dorsal and anal fin are more pointy in males
Prices:5-30€
Additional: A new form or species has been imported recently, and is sold as Uaru sp orange ...
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.
This will be a light to deep gray line that appears between the dorsal coloring and the belly. It will start on the sides of the mouth and extend along both flanks to the tail.
On white-bellied puffers, the tummy will begin to darken to gray.
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.
Sirip dorsal (punggung) yang sebelah muka dengan enam jari-jari yang keras (duri); dan yang sebelah belakang dengan satu duri dan sembilan jari-jari yang lunak. Sirip anal dengan satu duri dan 7-8 jari-jari lunak.
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.
Of the unpaired fins (i.e. consisting of a single fin), the most noteworthy are the dorsal and the anal fins.
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, ...
schalleri (28-30, vs. 31); more predorsal scales than B. schalleri (19-21, mode 21, vs. 17-19, mode 19); more postdorsal scales than B. prima (11-12, vs. 9-10); greater head length than B.
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.
The dorsal fin on a Double Tail is extended. Breeding Double Tails to Double Tails is a very risky cross, as this will produce fish with spinal deformities and short bodies due to the twin caudal peduncles.
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.
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.
Juveniles are marked with a prominent eye-spot on the dorsal fin and several cross bars outlined in a dark shade. They are sometimes mistaken for Angels of the genus Centropyge.
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.
The fish possesses two sets of paired fins (the pectoral and the pelvics), and two single ones the dorsal and the anal (also known as the median fins) plus the caudal fin.
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.
The dorsal, caudal and tailfin show a spectacular shade of blue and often hints of green.
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.
Breeding: They are easy to sex, males have long black dorsal and pelvic fins and the females have shorter red colored fins which can cause some confusion with some stores thinking they are two different species.
Males have long extensions to the dorsal and anal fins, and females - especially when they are in a breeding mood - get bright reddish bellies.
Albino Palaetus and Aeneus cory catfish (Corydoras paleatus and C. aeneus) are being injected with dyes to produce colored spots on the top of the caudal peduncle between the dorsal and caudal (tail) fins.
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.
Fins should be erect, especially the dorsal (top fin) - Collapsed fins usually spell trouble. Please note: there are exceptions! Puffers curl their caudal fin (tail) up against their body. Butterfly fish only erect their dorsal fins when alarmed.
A secondary, but less reliable, gender separator is the dorsal fin. Males tend to have taller dorsals, with higher contrast between the black and yellow markings, but this is not 100% reliable, while the anal fin margin width is.
Folded dorsal or caudal fin
4. Hanging from the surface or lying on the bottom
5. Slow reactions to disturbances
6. Rubbing against surfaces as of trying to scrape something off the body
7. Loss of luster
8.
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.
In the juvenile, The color graduates from lighter, dorsaly, to darker, ventrally. It has vertical markings on the body and blue highlights. The dorsal fin, anal fin, tail, and face are all sparingly detailed in a brilliant bright blue.
 See also: Fish, Water, Aquarium, Species, Dorsal Fin
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