While the Oceanogràfic called Electra and Viola an "exceptional pair," the aquarium noted that same-sex couples are not entirely uncommon.
"The formation of same-sex pairs is common in more than 450 species of animals and occurs both in zoos and in nature," the aquarium said.
"It’s the first time this has happened in our aquarium," the Oceanogràfic added. "So … Welcome to the world, little one!”
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