That’s in the sword family so many just get bunched under that name. It’s not your common sword. Or it doesn’t look like it now. More than likely it was grown emersed not submersed. So those leave will die off and longer leaves will grow in there place. Now if those leaves stay like that to one of the rarer swords. Could be a Brazilian sword. These usually don’t grow that well underwater and are an emersed species. Or it could be a grandi. We don’t see these that often and they can grow to about 20”. If so that’s a nice plant!!