"An 18-year study of the Octopoteuthis deletron, a little-known squid which dwells a depth of 400 to 800m, found that males mate as often with their own gender as they do with females.
The difference between the sexes is so slight and meetings with fellow squid so rare that the amorous males are either unaware or unconcerned whether the object of their attention is female or not, US-based researchers said.
There is little light in the depths where the squid reside and the darkness of the water "cannot aid much in recognising potential mates," they added.
Writing in the Royal Society Biology Letters journal, the scientists said the squid only have a single, brief reproductive period during their short lifespan and will mate with any partner they meet during this time regardless of its gender."
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