最近，人们在斐济发现了虾虎科新物种Cryptocentrus nanus。虾虎科物种完全长大后长达2英寸（5.08厘米），体积小巧，与虾是共生关系，喜欢栖息在沙子中。

全黑的Cryptocentrus nanus身上没有任何图案。人们很容易将其与常见的黑色虾虎鱼混淆，例如C. cryptocentrus。分类学家认为只有49毫米长的Cryptocentrus nanus已完全成熟，其唯一根据是样本中存在成熟的配子。

C. nanus的独特之处在于，其上颚长有特殊的牙齿，叫做犁骨齿。以前，人们曾根据犁骨齿来挑选出迷人多彩的Stonogobiops属虾虎鱼，例如白天线虾虎（S. yasha）。虽然全黑的Cryptocentrus nanus看起来没什么特点，但它向我们展示了虾虎鱼也可以极其小巧！

原文：

Cryptocentrus nanus from Fiji is the first Nano Watchman Goby

Cryptocentrus nanus is a new species of watchman goby recently described from Fiji. Clocking in at a whopping two inches long when full grown, the nano watchman goby is the smallest species of what we tend to think of when someone mentions a shrimp-associated, sand dwelling aquarium goby. 

Being all-black Cryptocentrus nanus is not patterned in any way and easily confused with dark specimens of common watchman gobies like C. cryptocentrus. The only reason the taxonomists recognized their tiny 49mm samples as being full grown was from the presence of mature gametes in the type specimens. 

What makes C. nanus unique is the presence of special teeth on the roof of its mouth called vomerine teeth which had previously been used to single out the attractive and colorful Stonogobiops gobies like S. yasha. While not much of a looker, the all black C. nanus is interesting for showing us that watchman gobies can get nano too! 

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