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Fiddler ray

life science Maturity 5-7 Next article →

Fiddler rays are a unique genus of fish known as Trygonorrhina. They belong to a larger group of animals called guitarfish. These animals are part of the Rhinobatidae family. They are also sometimes called banjo rays. These fish are benthic, which means they live on the very bottom of the ocean. They prefer specific habitats like shallow bays and seagrass beds. You can also find them near rocky reefs.

The physical structure of a fiddler ray is very distinctive. Their pectoral fins are flat discs. These discs are shorter and more rounded than those of other guitarfish. They have a slender tail that ends in a well-developed caudal fin. Two triangular dorsal fins sit on their backs. One of their most unusual features is a translucent snout. Their nostrils are also unique because of a nasal curtain. This is formed by nasal flaps that expand backwards and fuse together. This curtain reaches all the way to the mouth.

There are currently two recognized species within this genus. The first is Trygonorrhina fasciata, known as the eastern fiddler ray. The second is Trygonorrhina dumerilii, known as the southern fiddler ray. Scientists once thought the Magpie fiddler ray was a separate species. It was previously named Trygonorrhina melaleuca. However, research in 2015 changed this view. Experts now consider it a color pattern variant of the southern fiddler ray.

History shows how these species were identified by scientists. The eastern fiddler ray was named in 1841 by J. P. Müller and Henle. The southern fiddler ray was named in 1873 by Castelnau. These names help researchers track the different types of rays. Understanding these differences is important for marine biology. It helps us know which animals live in which parts of the ocean.

Each species has different physical measurements and habits. The eastern fiddler ray grows to a length of 120 cm. The southern fiddler ray is larger and reaches 180 cm. They are both found along the coasts of Australia. They find food by searching the ocean floor. They eat worms, crabs, and shellfish. They use their strong jaws to crush these items. The eastern species is also known to scavenge from fish traps.

Fiddler rays have a specific way of reproducing. They are ovoviviparous, which describes a certain type of birth process. In the southern fiddler ray, the egg capsules are a golden color. Each of these capsules contains three embryos. When it is time to give birth, they produce a litter. A single breeding cycle results in four to six young. This cycle allows the population to continue in their habitats.

These animals have a significant relationship with human activity. They are considered harmless to people. Divers can approach them easily in the water. However, they are often caught by commercial trawlers. This is known as bycatch, which happens when fish are caught unintentionally. Some recreational fishers catch them as well. The flesh of the southern fiddler ray is of good quality. It is sold in small quantities for food.

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