The anal fin consists of two spines and six to 9 rays. A single spine and five rays make up the pelvic fins, and the pectoral fins consist of 13-15 rays. The caudal fin of the yellow perch is forked.
Species Information.
| Scientific Name: | Perca flavescens |
|---|---|
| Other Names: | yellow perch |
Which fins on a perch have spines?
Fishes within the perch family have fins with both soft rays and stiff spines. The dorsal fin, located in the middle of the back, is divided into two sections; the front section is spiny and the rear section is soft rayed. The anal fin has two spines in front.
What does the pectoral fin do on a perch?
The pectoral fins, located on either side of the fish near the gills, do everything that pelvic fins do, and also help steer and control depth.
What type of fins does a perch have?
They have two separate dorsal fins: the front fin is spiny, and the back fin is soft. When handling the fish, care should be taken to avoid their sharp spines and sharp gill plates. Yellow perch have small teeth, and have no canine teeth.
How many spines does a perch have?
Like most perches it has two separate dorsal fins. The anterior, or first, dorsal fin contains 12–14 spines while the second has 2–3 spines in its anterior followed by 12–13 soft rays. The anal fin has 2 spines and 7–8 soft rays.
How many pectoral fins are on a perch?
two fins
The pectoral fins are the two fins located on the sides of a fish (or marine mammal).
Are perch spines poisonous?
The spikes are not venomous but they can prick the skin if the perch is not handled carefully. There are also flattened spikes on each gill cover and there are even small spikes on the scales so that when you pick up a perch it feels decidedly rough unlike the slippery feel of other fish.
What is the work of the pectoral fin in a fish?
The pectoral fins along with the pelvic fins help the fish by acting as brakes and can assist the fish with difficult maneuvers. This is very useful to fish that live in rocky or coral areas, with a need to chase prey around corners or to make short, sharp turns in order to escape from an enemy.
What is the definition of a pectoral fin?
pectoral fin in British English
noun. either of a pair of fins, situated just behind the head in fishes, that help to control the direction of movement during locomotion.
What is the function of the pectoral and pelvic fins?
The function of the pelvic fins is as variable as their morphology between fish. They are used in swimming as an aerofoil, brake, propulsor, and rudder, for ground walking, and for hovering.
Do yellow perch have spines?
As with all percid fishes, yellow perch have two dorsal fins. The anterior is convex in shape and consists of 11-15 spines. The posterior dorsal fin has a straight margin, consisting of one or two spines and 12-16 rays.
What type of caudal fin does a perch have?
The caudal (tail) fins of fish vary in their morphology. The perch exhibits a tail with two equal-sized lobes, but its vertebral column extends into the upper lobe. This condition is known as homocercal.
Does perch have fins and scales?
External anatomy. Perch have a long and round body shape which allows for fast swimming in the water. True perch have “rough” or ctenoid scales. Perch have paired pectoral and pelvic fins, and two dorsal fins, the first one spiny and the second soft.
Where are perch spines?
Perch have two dorsal fins and the front one is reinforced with long, sharp spines. There is also a spine on the rear of each gill cover. These spines are not poisonous like those of a weever fish but they can draw blood if the fish is handled carelessly and the puncture wound can become infected.
Why do perch have spikes?
The perch also comes with tough, thick scales, each scale is armed with lots of tiny spikes along the edges, which gives the fish a rough texture when held. The gill covers are also spiked on the rear edge to defend against larger predators in the water, such as pike.
Is a perch a bony fish?
Perch: bony carnivorous freshwater fish with an oval body and a spiny dorsal fin; its flesh is highly prized.
What does the spiny dorsal fin do?
The “spiny fin,” comprising the anterior part of the dorsal and anal fins, is an evolutionary novelty that contributed to the success of the spiny-rayed fishes. This domain contains heavily ossified spines that serve as defense mechanism and differ from the posterior flexible soft rays.
What are the 5 types of fins?
There are five main fins on a fish that are commonly described in fish Identification.
- Pectoral.
- Dorsal.
- Pelvic.
- Caudal.
- Anal.
Can fish fins cut you?
Handling Your Catch
Some fishes have sharp fins or teeth that can cut you. See our Angler Education pages for tips on how to handle different species. Minimize the time fish is out of the water (no longer than you can hold your breath.) Leave fish in the water if you can and use a tool to remove the hook.
What fish has spikes on its back?
Scorpionfish, lionfish, stonefish – these and around 250 other fish are highly venomous and have nasty spikes. Their dorsal fins have been turned into poison stings and they also have spines towards the ends of their bodies.
Do pectoral fins have bones?
The pectoral fin skeleton is located in the thoracic region of the body and articulates with the scapula and coracoid.