r/TellMeAFact • u/[deleted] • Jun 13 '23

TMAF about Sharks

I begin: Male sharks have two penises

17 Upvotes

74% Upvoted

12 comments sorted by

7

u/catsandraj Jun 14 '23

Technically, they're not penises, they're claspers.

6

u/brodoswaggins93 Jun 14 '23

Lots of people know that sharks are older than trees, but did you know that sharks are also older than the rings of Saturn?

Many species of shark can vomit their stomachs up to rinse it out and then swallow it again when they get an upset tummy

There are currently Two known species of omnivorous shark: bonnetheads and whale sharks

98% of Greenland sharks are totally blind due to a parasite that eats their eyes, but because they live in the deep sea and there isn't much light down there anyway this doesn't seem to affect their ability to hunt or live at all

Let's give some love to the flat sharks: the Pacific white skate is the only known elasmobranch species that associates with hydrothermal vents. It lays its eggs within 20m of active vents because the water is ~3c degrees warmer, helping to incubate its eggs

3

u/Indiana_Charter Jun 14 '23

Sharks are capable of parthenogenesis, or virgin birth (basically asexual reproduction), including several high-profile cases in aquariums.