The differences are pretty apparent:
This is a Brevis and it's labeled Goliath.
http://images.google.com/imgres?img...?q=hydrocynus+goliath&ndsp=18&hl=en&sa=N&um=1
This is a goliath
http://aqua-bonito.web.infoseek.co.jp/BIG/Hydrocynus Goliath062.12-01M04.jpg
Here is another goliath
http://img301.imageshack.us/i/fish708hk3.jpg/
This is a vittatus
http://img.photobucket.com/albums/v99/tigerfangs/ATFs/02FEB2005tigers023.jpg
Here is another vittatus
http://www.hippocampus-bildarchiv.de/images/A37522_1_Hydrocynus_goliath.jpg
Thank you to respective photo owners for demonstration purpose.
This is a Brevis and it's labeled Goliath.
http://images.google.com/imgres?img...?q=hydrocynus+goliath&ndsp=18&hl=en&sa=N&um=1
This is a goliath
http://aqua-bonito.web.infoseek.co.jp/BIG/Hydrocynus Goliath062.12-01M04.jpg
Here is another goliath
http://img301.imageshack.us/i/fish708hk3.jpg/
This is a vittatus
http://img.photobucket.com/albums/v99/tigerfangs/ATFs/02FEB2005tigers023.jpg
Here is another vittatus
http://www.hippocampus-bildarchiv.de/images/A37522_1_Hydrocynus_goliath.jpg
Thank you to respective photo owners for demonstration purpose.