Those are the megalops cyprniodes, they grown large too, about 4 feet in the wild, the pacific tarpons, mild mannered, but super speed and cool silvery scales. Asp, hmm...those are cool too, and probably couldn't be kept in an average tank, but many of the members here have tanks, 600-5000 gallons, and some 20,000-50,000 gallons, some with ponds, and lakes in their back yards, so your imagination is the limit.
While on this subject, I'm suppose to get some tarpon look alike, that grows faster, more predatory and from the Far East (secret)