Biology: True or False?

What is the difference between the True Percula Clownfish (Amphiprion percula) and the False Percula Clownfish (Amphiprion ocellaris)?

These two species are very similar but have subtle differences. The most reliable is that the True Percula Clownfish has ten spines on its first dorsal fin (the fin on top of its body closest to its head.) and the False Percula Clownfish has 11.

I believe this fits into the category of useless information. But, who knows, it may come in handy in a trivia game.

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True

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False

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Sources: Wikipedia