What are the 5 types of tail fins?
The types of caudal fins described here will be protocercal, heterocercal, hemihomocercal, hypocercal, homocercal, leptocercal (diphycercal), isocercal, and gephyrocercal.
What fish has a long dorsal fin?
Billfish have prominent dorsal fins. Like tuna, mackerel and other scombroids, billfish streamline themselves by retracting their dorsal fins into a groove in their body when they swim.
Which fin is more commonly known as the tail?
The tail fin is called the caudal fin. Pectoral and pelvic fins come in pairs. Dorsal, anal, and caudal fins are single.
What is a Homocercal caudal fin?
A homocercal tail is a caudal fin composed of two lobes of equal proportion. Homocercal tails are the most common caudal fin type in fish but can come in many symmetrical shapes. A homocercal tail is contrasted with a heterocercal tail which has unequal lobes.
What are the different types of fins?
For each fish, generally, there are five main fins follows: Dorsal, Pelvic, Caudal (tail), Anal and Pectoral as shown in Fig. 1. Dorsal fins are located either on the back of the fish or its top, it helps the fish during sharp turning or stops.
What is a Protocercal tail?
protocercal tail Possibly the most primitive type of tail found in fish. The posterior end of the vertebral column is straight, dividing the tail fin into two equal lobes supported by fin rays. A Dictionary of Zoology. “protocercal tail .”
What are the long fish called?
Whale shark
List of longest fish
| Rank | Animal | Scientific name |
|---|---|---|
| 1 | Whale shark | Rhincodon typus |
| 2 | Basking shark | Cetorhinus maximus |
| 3 | Giant oarfish | Regalecus glesne |
| 4 | Russell’s oarfish | Regalecus russellii |
What’s the difference between a shark fin and a dolphin fin?
The dolphin’s dorsal fin is curved backward toward the animal’s rear. It has a definite arc, with a sharply curved tip. A shark’s dorsal fin is broad and stands straight up from the animal’s back. The front edge of a shark fin is angled backward, while the rear edge is straight.
What types of tail fins are characteristics for fish?
Fish Fins
| Description | Adapted Function |
|---|---|
| Rounded tail | Slow swimming, accelerating, and maneuvering |
| Truncated (triangular) tail | Turning quickly |
| Lunate (moon shaped) tail | Continuous long distance swimming |
| Forked tail | Rapid swimming, somewhat sustained with bursts of speed |
What is the difference between Heterocercal and Homocercal tails?
What is the difference between a heterocercal and homocercal tail? A heterocercal tail is long and thin, such as a common shark tail. A homocercal tail has an even groove, like that on a regular fish.
What is a Heterocercal tail?
In fish, a tail in which the tip of the vertebral column turns upward, extending into the dorsal lobe of the tail fin; the dorsal lobe is often larger than the ventral lobe.
What is longitudinal fin?
Longitudinal fins within ducts are widely used in compact heat exchanger applications. Such ducts are also referred to as internally finned tubes. For the flow area evaluation, the fin thickness is considered as zero for all longitudinal thin fins.
What kind of fish has a continuous tail?
Eels provide classic examples of fishes with tail fins that are described as continuous, with the tail being hard connected to the body in such a way that it is difficult to say where the body stops and the tail starts.
What kind of tail does a ryukin goldfish have?
It looks similar to the fantail goldfish but stands apart with a prominent hump towards the back of its head which elevates the dorsal fin. The long caudal tail fins can have three or four lobes, with the three-lobed ryukin having what the Japanese call a ‘cherry blossom petal tail.’
Where are the median fins located on a fish?
Most fish have two kinds of fins: median and paired. Median fins are single fins that run down the midline of the body. The dorsal fin is a median fin located on the dorsal side of the fish. The anal fin and caudal fin are also median fins. Paired fins are arranged in pairs, like human arms and legs.
Where are the pectoral fins located on a fish?
The pectoral fins are vertical and are located on the sides of the fish, usually just past the operculum (Table 4.7). Pectoral fins are similar to human arms, which are found near the pectoral muscles. Many fish, such as reef fish like wrasses (Fig. 4.25 B), use their pectoral fins for locomotion. Table 4.7.