Seahorses
 

I have two seahorses in my Refugium
Question : what could be the reason for color fade ?
1/ Yellow....2/ Orange

I know they can change colors, but Im not sure as to the reason.

The change could be due to stress, change in diet, & most likely, change in scenery. The colours are often used as camouflage, so if they change their setting, then the colours will as well. Most of the time, when you buy the brightly coloured ones in th LFS, after a few weeks/months, they'll all be more or less similar in colour.

well there ya go