common ancestor?

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Hard to define. There have definitely been precursors to todays aros. 50 million years ago, there were Osteoglossids living in waters that became part of the US (Green River Basin, Wyoming)

phareodus-testis.jpg
 
Brazil made an early attempt of the arowana about 125 million years ago in the Ceara area of the Santana Formation. It's not yet known if Cladocyclus ferus is a line that failed or if they continued evolving:

Cladocyclus-ferus.jpeg
 
It's just these particular specimens that are small. I also have a Cladocyclus specimen that's over 4 feet and a Phareodus that's over 2 feet. Museums have specimens that are larger.
 
Oddball;612462; said:
It's just these particular specimens that are small. I also have a Cladocyclus specimen that's over 4 feet and a Phareodus that's over 2 feet. Museums have specimens that are larger.
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You Hoard :D you have more fossils of fish than I have living fish.. And your fossils of fish are worth more than my house probably :)

I think your older than you say:D Like maybe your one of the people that is to walk the earth til it's over :evil_lol:
 
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