I know new stuff now!!
It took me 3 minutes to learn an information I would learn in school for like 3 years
that fucking shark
i’ll probably hate myself for this when i wake up tomorrow
welp this is the best one everyone can stop now
New insights have shed light on how shark embryos avoid predation.
For those species of sharks that lay eggs, several defense mechanisms are required to ensure the survival of the new generation. Many such methods were previously well know;the eggs are deposited into and anchored by vegetation, their dark coloration provides a nice camouflage, and the egg is sealed, preventing predators from smelling the developing embryo. At a certain stage in development, however, the bottom of the egg (nicknamed a mermaid purse) weakens and opens, allowing the embryo to circulate oxygen rich seawater throughout the casing. Suddenly, the shark’s vulnerability to predation is dramatically increased.
The embryos are not completely helpless, though. It has now been discovered that a sharks ability to sense the electrical fields of nearby organisms (a trait that makes them formidable predators) develops soon after the egg sac opens up. This allows the embryo to sense nearby threats and act accordingly, mainly by halting all motion. Their itty bitty tails cease their whipping, and they even stop moving their gills, essentially holding their breath.
As sharks continue to develop, hatch, and mature, their electric sense organs (ampullae of Lorenzini), continue to become more sensitive to electric fields, granting them protection and valuable hunting skills.
