A few years ago, something surprising began turning up in Asia’s fish markets: the gill rakers of manta and mobula rays. The good news is that manta ray tourism worldwide brings in $100 million in revenue versus $500 per kilogram of gill rakers. Manta rays are the largest rays in our oceans, with two recognized species Manta birostris, the giant manta, and Manta alfredi, the reef manta. It is the largest ray which can grow up to 7m across and can weigh 1.5 to 2 tonnes! Shawn Heinrichs and Paul Hilton, photographers who have been monitoring the international soaring trade in shark fins, decided to find out what was going on. Manta Alfredi is the smaller one with a wingspan of up to 4m. Size 20 feet (6 m) Diet Plankton and small fish; Range Rays generally live and feed on planktonic animals at the bottom or close to it – one notable exception is the Oceanic manta ray, which glides through the open ocean feeding on plankton near surface to depths of up to 1,000m.

There are many sedentary populations throughout the world. This is the only known video as per the Manta … Food that enters the mouth is filtered from the water by the ray’s gill rakers, and then swallowed whole. This is somewhat similar to a human clearing its airways. Manta rays are a pelagic species, living their lives in the water column, not near the sea bed, like their sting-ray relatives. In the past decade, … A large pacific Manta ray is seen "coughing" out planktonic debris from its gill rakers. We are worth more alive than dead, duh!

Yet the market for manta ray gills is relatively new. Because of the high demand, one pound of manta gill rakers can sell for over $200. Female is larger than male. Even in fisheries that do not target mantas, they often end up caught on the line or in the nets anyway.

Fishermen in countries like Sri Lanka and India hunt the graceful giants for their gill rakers: rows of cartilage that are increasingly popular in Chinese medicine. You can help me and my fellow manta rays by visiting Manta Ray of Hope and watching their convincing video and by visiting Project Aware to sign a petition or donate money. During feeding, the manta ray may also swim in somersaults in order to pass through a cluster of plankton multiple times.

Manta Ray of Hope Manta and mobula ray gills at a market. In the film, manta ray gill rakers can be seen clumped together by the thousands in bags in the marketplaces that he and Mr. Hilton visited. 7. “Ten years ago the market for manta gills didn’t even exist,” said Susan Lieberman, director of international policy at the Pew Charitable Trusts .

In many Chinese communities, manta ray gill rakers are believed to treat a variety of ailments, including cancer.

Fishing a manta for its meat, skin, or for gill rakers for Chinese traditional medicine can earn hundred of dollars. They eat tiny organisms, often microscopic, called plankton, which the manta ray consumes through filtering. Gill rakers from a large manta ray. For this purpose, it has within its gills some structures called gill rakers, which are widely sought-after in the market since they are used as remedies in traditional Chinese medicine. The gills will be dried and sent to China for the traditional Chinese medicine market. One such healthy population can be found off Bali around the West coast of Nusa Penida.

However, each ray can bring in $1 million in tourism dollars over its lifetime.

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