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The egg case is very smooth and lacks external fibrous material. [1] This egg case can be easily identified from all others in that it is the only one to have a steep ridge; giving the case a convex shape. [1] The keel on the egg case is considered very broad; representing 30–33% of the width of the egg case. [1]
A pink manta ray has been observed in Australia's Great Barrier Reef and scientists believe this could be due to a genetic mutation causing erythrism. [24] The fish, spotted near Lady Elliot Island, is the world's only known pink manta ray. [25] [26] M. alfredi with mouth closed, cephalic fins rolled and ventral surface showing distinctive markings
The reef manta ray, as the oceanic manta ray, is ovoviviparous. After mating, the fertilized eggs develop within the female's oviduct. At first, they are enclosed in an egg case and the developing embryos feeds on the yolk. After the egg hatches, the pup remains in the oviduct and receives nourishment from a milky secretion. [18]
A manta ray breaching during a study of courtship behaviors off Florida's east coast.
Steve tragically died in 2006 after a sting ray barb pierced his heart. And a "haunting" new photo of Robert freediving with a similar animal recently ignited fan debate.
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Stingrays are caught by fishing lines or nets. Private fishermen tend to target these ray species due to the high payout from their gill plates. Large fishing operations tend to catch rays as bycatch when fishing for more desirable food fish such as tuna, where they are brought back to shore and sold regardless of the intention to catch these fish.
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