Manta Ray Genetics & Evolution

By: Brie von Beren


  • Mating seasons vary in Japan it occurs in summer, but in the Maldives in mid fall
  • Warm water
  • Cleaning stations
  • Males jump from water to impress females
  • Hormones are released that attract rays to each other
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Mobula Rays belly flop to attract a mate - Shark: Episode 2 Preview - BBC One


  • The manta ray shares many similar reproduction characteristics as many species of sharks
  • Manta ray give birth to live pups, but they hatch from eggs
  • Although animals that give live birth are called mammals, they are called oviparous meaning: the species gives birth to a live pup that hatches from an egg inside the mother
  • Sexual union of a male and female this means the male enters the copulatory organ called the claspers in the female cloaca to transfer sperm and start the fertilization process

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  • Female carries pup for 12-13 months
  • Can give birth to up to two pups at once
  • Pups feed on yolk for nuetriance
  • Once pups are born there independent

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  • There are not many sub-species of manta rays there are two kinds of manta ray there is the Manta alfredi and the Manta brostris
  • They are very much the same but one is more commonly found in shallow waters off of reefs, and others in deeper water
  • Different coloring around the mouth area
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  • Evolved from bottom-dwelling stingrays
  • Many adaptations
  • More wing-like pectoral fins
  • Barbed spine non-poisonous
  • Became filter feeders
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The manta ray has many adaptations that allow it to thrive on a daily basis. One of the major ability the manta ray has is it has the ability of giving birth to a pup without the flow of oxygen from the placenta. The manta ray embryo obtains oxygen by buccal-pumping of uterine fluid, just like fish and how eggs obtain oxygen through the water.

Punnett Square:

The Phenotypes for manta rays are:

Albino (aa) or Black (Aa)

Spotted (AA) or Plain (Aa)

Long tail (Aa) or Short tail (Aa)

Punnett square 1- 1/2 black: 1/2 albino

Punnett square 2- 1/2 spotted: 1/2 plain. 50% of the offspring will have both traits.

Punnett square 3- phenotype: black 3: albino 1. Genotype: AA 1: Aa 2: aa 1

XBXB= black (female)

XBXb= black with recessive albino trait (female)

XbXb= albino (female)

XBY= black (male)

XbY= albino (male)

Punnett square 4- 50% of the female offspring will have the recessive albino trait.