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A blue spotted stingray swimming in the sandy shore bottom

Bluespotted ribbontail ray

Taeniura lymma

On view
Ocean in Motion
Animal type
Sharks & rays
Ecosystem
Coral reefs
Relatives
Maskrays, the round ribbontail or blotched fantail ray, the Atlantic round stingray
Diet
Mollusks, crabs, shrimp, worms, and small fish
Range
At or near the seafloor in temperate and tropical shallow waters around coral reefs; widely distributed in the Indian and Western Pacific Oceans
Size
Up to 12 in. (30.5 cm) wide, 24 in. (61 cm) long

Meet the bluespotted ribbontail ray

The bluespotted ribbontail ray is named for the electric blue spots on its back and sports two blue stripes along its tail. Its color doesn't come from blue pigment, but rather from skin cells packed with tiny structures that scatter blue light, backed by a dark pigment layer that makes the blue extra vivid.

Natural history

Behold the bluespotted ribbontail ray, with its disc-shaped body and bright blue dotted back. If you were to flip over a bluespotted ribbontail you would see its white underside. Its tail is tapered with blue side stripes and one or two venomous spines. These rays use their venomous spines to defend against predators, which can be fatal–even to humans. However, they are likely to swim away from confrontation. 

Conservation

The International Union for Conservation of Nature (IUCN) once assessed the bluespotted ribbontail ray as near threatened, but recently moved it to Least Concern in 2021. Despite its Least Concern rating, the bluespotted ribbontail ray is still targeted by fisheries. The species is occasionally targeted by fisheries and is also caught as bycatch, though some populations are increasing as their predators become scarcer.

A close up of a bluespotted ribbontail ray that shows an eye and bright blue spots against a yellow body
A bluespotted ribbontail ray slides along the bottom of a sandy bottom floor of the ocean, the back of its eyes are visible and you can see many spots of bright blue on its back

Cool facts

  • Bluespotted ribbontail rays can sense the electric fields that other living things produce. 
  • They generally live in small groups, but when the tide rises they migrate en masse to shallow, sandy areas to scoop up food.
  • As the tide recedes, these animals shelter in crevasses and under rocky ledges in the coral reef.
  • These rays reach sexual maturity at a young age, and every litter can contain up to seven pups! 

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