Caudal peduncle
the narrow area of the body from the posterior (back) end of the anal fin to the base of the caudal (tail) fin.
Compressed
squeezed together or narrow from side to side, flattened laterally.
Caudal Peduncle: The part of the body which attaches the caudal (tail) fin to the body. The surgeonfish's spines are located on the caudal peduncle.
caudal peduncle - The part of the body which attaches the caudal (tailfin) to the body.
color rendering index (CRI) - A number used for rating lite bulbs on a scale up to 100, where 100 is equal to sunlight.
Caudal Peduncle
The name given to the area where the tail of a fish joins the body. Sometimes also called the "wrist".
Caudal peduncle Part of fish's body joining the caudal fin to the main body.
Encyclopedia 1.0 by Rebecca Smallwood
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Caudal Peduncle - This is the part of the fish that attaches the Caudal (tail fin) to the body of the fish.
Caudal (peduncle) spot:
Is there a spot/patch at the base of the tail?
If so, describe its size and shape.
Does the lateral band merge with it or stop before it gets to it?
Lower caudal peduncle spot — Present
Mid-body line — Present
Red reaches well past gill — No ...
In some species of fish this can be connected, or appear connected, to the anal fin. The Caudal peduncle refers to the base of the caudal where it connects to the body.
An obvious black band extends from the snout, through the eye, and to the caudal peduncle. The underparts are white. The rear part of the body may be marked with faint transverse stripes.
Delta tail: This is where the tail is in the shape of a delta coming off of the caudal peduncle. The spread is measured in degrees and can vary from 50 degrees to 70 degrees.
A characteristic of this species is a black blotch below the lateral line on caudal peduncle. Often there is a green ocellus on each operculum, being only faint in yellow-green and orange color variant. Preopercular margin finely serrated.
The caudal peduncle is marked with a black band, this black band encircling the caudal peduncle from dorsal to ventral surface. The adipose fin, supported by a small fin spine, sometimes contains black pigmentation.
The Clown Trigger has a black body with large white spots and yellow lips, yellow caudal peduncle, and a yellow dorsal blotch. The yellow dorsal area has black and white markings throughout.
The male proceeds to curl his caudal peduncle alongside her head and enfolds her head with it, vibrating his tail at the same time.
By the time Panda fry reach around 10 to 14 mm, they will acquire the 'Panda eye patches' and the black mark on the caudal peduncle.
Adults have two small black spots, one mid body and one at the base of the caudal peduncle. The juveniles have a few more spots in-between. Mature males develop a nuchal hump on their heads.
The Papuan toby is brown overall with blue spots on the side of the body, blue lines on the back and the dorsal surface of the caudal peduncle, a black spot at the base of the dorsal fin and orange on the underside of the snout.
Bright orange caudal peduncle and tail fin, bright blue patch forward of the caudal peduncle and including the dorsal fin (which is located more toward the rear of this fish), and a spangling of black and tan over the rest of the body.
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 second of the eyespots appears on the caudal peduncle, immediately in front of the caudal (tail) fin of the fish, again on each side of the fish.
Double Tail: This tail type is a very beautiful one, where the caudal fin is split in the middle, producing two caudal peduncles and what are referred to as tail lobes (fins).
metae this stripe is narrow and solid along the ridge of the back and curves down onto the caudal peduncle at the base of the tail; in both C. melini and C. davidsandsi it is straighter and extends into the lower lobe of the caudal fin.
A stripe beginning on the caudal peduncle extends through the middle of the caudal fin to its margin. Males can be identified by their yellow (or orange) anal fin with five dark bands and a dark margin.
In festae the occelus is a round blotch circled by iridescent scales and is in the top third of the peduncle. In the other fish, the occelus is more like a stripe that extends more than halfway down the peduncle.
The dark patch on the caudal peduncle (the last part of the body just in front of the tail) and the slightly extended dorsal fin lappets are two of the features that identify Apistogramma panduro from Apistogramma nijesseni.
O. hoppei has a clear characteristic, which differentiates him from all others. The point of peduncle is distinct over the entire width of the peduncle and convex rounded to the back. Otocinclus species should always be kept as shoal.
Adults have a golden to yellow head, a black vertical bar behind the tip of the pectoral fin, merging with a broad black area on the upper side, continuing to the top of the caudal peduncle and upper caudal fin and blue underneath.
metae stops short at the caudal peduncle. The C. melini connection has melini having the same black body stripe ending on the bottom lobe of the caudal fin, ...
The male has a more prolonged body, while the female`s is more compact, but the peduncle is more oblate on the flanks. It is very hard to describe a guppy male from the coloration point of view.
DESCRIPTION: Short body (2 inches), stocky, with a dirty white/sand colored body, and two black stripes: one on the caudal peduncle and dorsal fins. Fins matched with body color and a slight metallic shimmer in direct lighting.
This feature is one of the most distinguishable to tell when you have a group together. The males stripes on the caudal peduncle (tail base) are much more pronounced and bolder than the stripes on a female.
Zebrinus
The barred pattern or zebra-type pattern of 2 to 5 vertical dark pigmented stripes on the peduncle area of the fancy guppy, expressed only in males which is carried by a dominant gene.
Sex differences: Mature males develop elongated dorsal fin rays. Both sexes have a golden metallic sheen on the body, a thick black band across the caudal peduncle, and a red stripe through the eye.
These plants flower readily and like the other Echinodorus species form plantlets on the flower stalk or peduncle, these can be separated and replanted in the substrate (seems to flower more in the summer months).
All varieties have the ten dark, varetical bars from the lips to the peduncle.
 See also: Fish, Caudal, Caudal peduncle, Water, Species
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