This is a re-post of an article I read last month and am still thinking about. Thanks to IFLS. She does excellent work, sharing information that blows my mind once or twice a week.
These are octopus eggs.
Octopus reproduction is
fairly uniform across species. When a female is ready to mate, she
releases a chemical into the water that attracts males. They follow this
chemical to the female, where they will often fight one another
for the right to mate with the female. Sometimes the female will mate
with more than one male. The same chemical that attracts the males stops
the males from eating the female - cannibalism is common amongst
octopodes.
Once it has been decided who will be mating, the
male transfers packages of sperm called "spermatophores" to the female
using his third right arm (which typically has no suckers). The female
stores these, and then builds a den. She then seals the entrance. Once
this is complete, she lays the eggs and fertilizes them as she goes
using the spermatophore. A female octopus can lay tens of thousands of
eggs, and they all hang from the roof of her den. Once laying is
complete, she settles down and spends the next few months (up to six and
a half, depending on the species) caring for the eggs. She ensures that
bacteria and algae do not grow on them, and she blows water across them
to ensure a constant oxygen supply.
The eggs will then hatch,
and the mother removes the rocks sealing the entrance. The offspring
swim to the surface, and the mother crawls out of her den and dies.
Interestingly, octopodes are known to be incredibly intelligent. Read more about octopus intelligence here in Orion Magazine.
"Researchers who study octopuses are convinced that these boneless, alien
animals—creatures whose ancestors diverged from the lineage that would
lead to ours roughly 500 to 700 million years ago—have developed
intelligence, emotions, and individual personalities. Their findings are
challenging our understanding of consciousness itself."
Fascinating.
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