The bristlemouth surgeonfish of theCtenochaetus属是一些最完美的水族馆鱼，具有大小，行为和处置，似乎是为礁石罐中的生命而定制的。水族馆的爱好中有许多物种可用，但是今天我们想看看这个群体中自然分布非常不同的双胞胎。
The yellow eye kole tang,Ctenochaetus strigosus, and the Indian Gold Ring or squaretail tang,CTENOCHAETUS TRUNCATUS, are two very similar looking fish with yellow eyes and a chocolate brown body. The former used to be one of the most common surgeonfish in the saltwater aquarium hobby but the latter species has now become the stand-in becoming more commonly available in recent years.
The squaretail tang, as the name suggests, has an uncharacteristically flat edged caudal fin within a genus of surgeonfish which mostly have lyre shaped tail. The body color can range from light brown to almost dark mauve in coloration with a yellow eye ring and small spots all over the body.
浅色的斑点有时会显得蓝色，但眼睛周围的黄色比众所周知的Kole Tang小得多。尽管它们的外观非常相似，但Squaretail Tang与夏威夷流行的太平洋山脉相去甚远，在整个印度洋中分布广泛，因此没有真正的机会在野外发现两者的自然杂种。
Kole Tang，Ctenochaetus strigosus，曾经是从夏威夷收集的业余爱好中最常见的盐水水族馆鱼之一，但此后，当在阿罗哈州禁止观赏鱼类收集时，供应已被完全切断。这款浓郁的棕色外科医生在其大部分身体上都有薄薄的蓝色条纹，这些条纹变成脸部的斑点，亮黄色的斑块覆盖了眼睛。
一旦卖科尔唐约50美元或更少is not exactly a showcase fish when it is young with only its eye patch providing any sort of color to its overall appearance. It might be a subtle beauty when the fish is around three to four inches long but as it matures the blueish stripes become more pronounced, the unpaired fins become more elongated and the tail becomes highly lunate with streamers developing at the tips.
我们很幸运地拥有大型的kole唐，这仅比其最大尺寸18厘米或7英寸的最大尺寸少了几厘米，而且其嘴巴显示出很多蓝色。我们已经看过数千个Kole Tangs，甚至过去一直保持着一些，但我们不知道多么美丽Ctenochaetus strigosus可以在大型成熟的时候变成，因此可耻的是，它们不再在水族馆的爱好中广泛使用。
The bristlemouth tangs of theCtenochaetus没有像他们那样的大张旗鼓斑马瘤andAcanthurus亲戚，但他们更擅长吃藻类，（相对）温顺和不是outgrowing the average home aquarium. There are many other species in this group of nearly perfect aquarium fish so if you’ve never kept one before definitely give them some consideration the next time you come across them at your local fish store.
