Gender-altering fish

Some species of fish, such as clownfish, gropers and eels, are able to change their gender. For instance, all blue gropers are born as females (and they are brown to reddish-brown). Each area typically only has one or two male blue gropers, and if the dominant male blue groper dies, the largest female would change…

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Longest-living vertebrate

Greenland sharks are now the longest-living vertebrate animals (that we know!). By using radiocarbon dating on the eye lens cells of 28 Greenland sharks, researchers found that the oldest of the bunch was 392 (plus/minus 120) years old.   Further reading:  —————————- Eye lens radiocarbon reveals centuries of longevity in the Greenland shark (Somniosus microcephalus)…

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