avea_reef

avea_reef AveA Reef

Marine Aquarist & Magazinist !! Sharing the beauty of reefs through handpicked! Follow me for more Reef hobby inspired content 🚨 👻

Starfish don't have a brain. They are controlled only by their nervous system and chemical signals.
05/07/2025

Starfish don't have a brain. They are controlled only by their nervous system and chemical signals.

Coral reefs are the most diverse marine ecosystems, but they are very sensitive to changes in ocean temperature and acid...
05/07/2025

Coral reefs are the most diverse marine ecosystems, but they are very sensitive to changes in ocean temperature and acidity.

Clownfish have one of the most fascinating life strategies in the ocean. All clownfish are born male, but they possess a...
04/07/2025

Clownfish have one of the most fascinating life strategies in the ocean. All clownfish are born male, but they possess a rare ability — they can change s*x later in life. Scientists classify them as protandrous hermaphrodites, which means they start out as males and can become females depending on their social situation.

Within each clownfish group, there’s a clear hierarchy: the largest, most dominant individual becomes the female; the next largest is the breeding male; and the rest are smaller, non-breeding males. If the female dies, the breeding male undergoes a permanent s*x change to become the new female, and one of the non-breeding males rises in rank to take over as the new breeding partner.

This transformation is driven by social cues and backed by major hormonal shifts. Research shows it begins in the brain, where changes in social status cause androgen levels to drop and estrogen to rise. This leads to the breakdown of testicular tissue and the development of functional ovaries — a full biological transition from male to female.

This incredible ability ensures the survival and reproductive success of the group, even after the loss of its female. It’s a powerful example of how behavior, biology, and social structure are closely linked in the natural world.

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