Japanese sleeper ray

Narke_japonica

The Japanese sleeper ray (Narke japonica) is a species of electric ray in the family Narkidae. It is found in the northwestern Pacific Ocean, particularly around Japan, Korea, and parts of China. This species is known for its ability to generate electric shocks, which it uses for both defense and prey capture.

Description

The Japanese sleeper ray has a rounded, flattened body typical of rays, with a short, thick tail. Its coloration is generally brownish with lighter spots or patterns. The maximum recorded length of this species is about 40 cm. The ray's electric organs are located on either side of its head, capable of delivering a shock to deter predators or stun prey.

Habitat

This species inhabits sandy or muddy bottoms of coastal waters, often at depths ranging from 20 to 100 meters. It is typically found in temperate regions and prefers areas with ample cover and food supply.

Behavior

Japanese sleeper rays are generally solitary and nocturnal. They spend much of their time buried in the substrate with only their eyes and spiracles exposed. This behavior helps them avoid predators and ambush prey. Their diet mainly consists of small fish, crustaceans, and other invertebrates.

Reproduction

The reproductive biology of the Japanese sleeper ray is not well-documented. Like other members of the order Torpediniformes, they are likely to be ovoviviparous, with embryos developing inside eggs that remain within the mother's body until they are ready to hatch.

Conservation

There is limited information on the population status of the Japanese sleeper ray. However, like many marine species, it may be affected by habitat degradation, pollution, and fishing activities. Further research is needed to determine its conservation status and implement appropriate measures.

See also

• Electric ray
• Narkidae
• Marine life of Japan