Well, I've never been much of one for... I don't know what you'd call them. Gender norms? Protocols? I came across Paris and really liked it for her; remembered Paris of the Trojan War and thought it would go well with Odysseus and Penelope, two of my other fish who also have names from Greek Mythology. It didn't really occur to me as odd to name a female fish after a male character. A name's a name, you know!
Though I miiiiight also have been a little bit influenced by the actors from Troy... I'm a huge Lord of the Rings fan (books and movies!) and Odysseus was played by Sean Bean, Paris by Orlando Bloom, who also played Boromir and Legolas in The Lord of the Rings, repectively. That didn't really help in swaying me from the decision. In a very dorky way I suppose I think it's kind of cool... I should make a collage of Odysseus and Paris with their human counterparts!