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Pez payaso
Océano
I must admit I had not look further the family as I am not a specialist of fishes. Thanks freelancing for the precision.
The note on the clownfish sexes is really interesting. I was not aware it was possible.
While the suggestion of Clownfish is close, it is more specifically a False Percula Clown. I had a mated pair of these in my salt water tank years ago. An interesting bit of trivia - all clownfish are born as males. Two will pair up and one will change gender to female and get larger.