Did I accidentally buy a swordtail instead of a platy?

[garlicrbrian]

First off, sorry for the bad pictures, I took these while drip-acclimating the fish because I can't exactly get a good picture from the side in a pond. Anyway, I bought a group of three platies earlier but this one is especially big and I'm starting to wonder if I actually got a swordtail or maybe a hybrid. Normally I wouldn't be too concerned about this but I'm putting these fish in a 12 gallon patio pond and I know swordtails get big.

 

[Littlebudda]

Look like platies to me a bit on the skinny side but I think platy

 

[chromedome52]

All your domestic Swords and Platies are hybrids to some degree, as the two species were crossed many times to create the color varieties. Your fish does appear to fall somewhere in between the two, more than is usually seen. Observing their behavior can sometimes offer clues as to which species they are closer to, but personally I doubt this fish will get particularly large.

 

[BogMonster]

Looks like a platy to me! I have two female platys I raised from fry (out of two platys from Petsmart), and they are currently as big as my male swordtail. The ladies are just now reaching the age to be sexually mature, jury is still out on the swordtail's age. Here's one of my girls This was only for a moment to take photos. The cup is a 150ml measuring cup from Anchor Hocking.