Arapaima Gigas
Why some Arapaima are absolutely silver and red while others are black and red? Two different species? The one in Thailand seem to be all silver and red:
http://www.anglingthailand.com/gallery/gallery.htm
While the one from the Amazon seem to be all black and red. Water temperature? I tried to check the babies and again two different types, some silver and some black. I am not sure if this is about sex as I read the one that is slender with the colour red or a lot of it is male compared to the large female that has little red to none.

Why some Arapaima are absolutely silver and red while others are black and red? Two different species? The one in Thailand seem to be all silver and red:
http://www.anglingthailand.com/gallery/gallery.htm
While the one from the Amazon seem to be all black and red. Water temperature? I tried to check the babies and again two different types, some silver and some black. I am not sure if this is about sex as I read the one that is slender with the colour red or a lot of it is male compared to the large female that has little red to none.

