Fish-e Trivia for Monday-itis. Sex changing fishes!

Did you know that barramundi start as males and then as they get bigger, turn into females (the feminists may say,”Mature into females!”)?

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The reverse is true in wrasses. The fish that live in small groups start off as females and the largest, most mature fish becomes the male. This male guards their territory and his harem. If the male meets his demise, then the next largest fish (a female) will turn into the new male fish!

Of the popular aquarium fishes, some say that some of the female swordtail fish can turn into males, developing the long caudal fin extension and modification of the anal fin to form the gonopodium.

These are just a few examples of the sex changing fishes out there.

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Yours sincerely,

Dr Richmond Loh

BSc, BVMS, MPhil (Vet Path), MANZCVS (Aquatics), MANZCVS (Pathobiology), DipPM.
Veterinarian | Adjunct Senior Lecturer Murdoch University | WAVMA Communications Committee Member |
Secretary Aquatic Animal Health Chapter – Australian and New Zealand College of Veterinary Scientists (ANZCVS)
The Fish Vet, Perth, Western Australia, AUSTRALIA. Mobile Veterinary Service for fish and other aquatic creatures.
http://www.thefishvet.com.au
Ph: +61 (0)421 822 383

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