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The Private, Exclusive Guide for Serious Divers Since 1975
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March 2024    Download the Entire Issue (PDF) Vol. 50, No. 3   RSS Feed for Undercurrent Issues
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Flotsam & Jetsam

from the March, 2024 issue of Undercurrent   Subscribe Now

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Immaculate Conception? In February, the Aquarium & Shark Lab by Team ECCO, located in Hendersonville (N.C.), announced its stingray Charlotte was pregnant. Yet, they had no male stingrays in her tank. Scientists have concluded that the pregnancy is a rare process called parthenogenesis, in which the eggs develop independently without fertilization and create a clone of the mother.

Sharks Are Remarkable. Chelsea Black, a researcher studying shark migrations off Jupiter, FL, published an image of a silky shark that was regenerating a dorsal fin, ripped off when someone removed a satellite tag her team had attached. Last June, the same silky reappeared off Jupiter, giving researchers the rare opportunity to observe the shark's recovery over 232 days. They found that the shark's dorsal fin was almost back to 90 percent of its original size, having regenerated more than half of what had been cut off nearly eight months previously....

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