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The giant oceanic manta ray can grow up to a maximum of 9 m (30 ft) in length [6] and to a disc size of 7 m (23 ft) across with a weight of about 3,000 kg (6,600 lb), [7] [8] but the average size commonly observed is 4.5 m (15 ft). [9]
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 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]
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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.
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]
Manta ray courtship off Florida's east coast documented in novel study that could help conservation. Gannett. Kimberly Miller, Palm Beach Post. July 11, 2024 at 5:07 AM.
The eggs of oviparous skates are laid in leathery egg cases that are commonly known as mermaid's purses and which often wash up empty on beaches in areas where skates are common. Capture-induced premature birth and abortion (collectively called capture-induced parturition) occurs frequently in sharks and rays when fished. [ 7 ]