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The day a male spear squid hatches determines which mating tactic he will use throughout his life, according to new research. Spear squid (Heterololigo bleekeri) that hatch earlier in the season become “consorts” which fight for mating opportunities.
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If you're scientifically minded, you might not think much of horoscopes and their predictions of your fated future, even if they are based on the positions of stars and planets in the sky on the night you were born.
Spear squid males are either consorts, who compete with males for females, or sneakers, who discreetly fertilize eggs. Which tactic a squid will use is determined by their birth date, a study says.
A research group from the University of Tokyo and others has announced that squid, which are known to eject ink to confuse predators and escape, also use the ink in a courtship behavior to make themselves more conspicuous and appeal to females.