damselfish,algae

damselfish (chromis sp) pair fighting for territory or mate
最常见的一种热带鱼,humbug dascillus / four stripes damselfish
symbiosis: when living together is win-win
面前的那只可能是, damselfish(少女鱼),但是和图片里的颜色不是很一
whidbey island critters