Roa是我们最喜欢的深水蝴蝶鱼属之一，尽管它至少包含四个成员，但只有四个成员必威官网登录随行版Roa excelsais frequently covered. AllRoa物种以相同的棕色和白色垂直带的模板图案化，并且是深水鱼类，能够居住在400英尺的深处。其中，R. modestusis the commonest and can be found in the South-China Seas and Japan. It is peculiar however that in Hong Kong, they can be found in waters as shallow as 5-10m during winter, while in other parts of their range they are found relatively deeper.
在夏威夷流行相似但更受欢迎R.excelsa, the brown takes on a more golden hue, and the best way to describe the colour would be that of slightly burnt caramel, at the intermediate phase where sugar is a golden brown just before it starts to burn.R. excelsa在所有的乐队中都有最锥度Roaspecies, being acute at the top nearer to the dorsal fin. Its ocelli on the soft dorsal fin is also oblong, compared toRoa modestuswhich we are featuring today.
正如刚才提到的，R. modestusis the commonest and also the cheapest member of the genus. They are seasonally common in the aquarium trade, but only domestically where they are caught. In Hong Kong, Taiwan and Japan,R. modestus是一种负担得起的，经常遇到的蝴蝶鱼。必威官网登录随行版因为它们可以在冬季的较浅水平上找到，所以与R. excelsa. Their geographical range also allows for easy collection compared to deepwater Hawaii forR. excelsa.Roa jayakari和Roa australisare two other members who are almost never seen, and they are often trawled up as by catch from commercial fisheries. There may be at least one more undescribed species ofRoafrom the Philippines.
R. modestusas seen above is pleasantly coloured in light coffee brown and white. Unlike the other members of its genus, it has very even and non tapering bands that run vertically down the body. In properly collected individuals, they may do well in aquariums, but will usually need a couple of days or a week to settle down and start taking prepared foods. It is important to note thatRoa modestus, like all otherRoa物种，受益于稍低的温度。可惜这种鱼在美国和欧洲市场上并不常见。它的美丽和负担得起的价格使其成为Uber昂贵的好替代品Roa excelsa.
