Two spinefoot colour morphs: mottled spinefoot Siganus fuscescens and white-spotted spinefoot Siganus canaliculatus are synonyms

Mottled spinefoot Siganus fuscescens and white-spotted spinefoot Siganus canaliculatus are two similar species that differ subtly in colouration and morphology. Three major mtDNA clades were identified for these species, but individuals were clustered by amplified fragment length polymorphism (AFLP) according to geography rather than morphology, suggesting that the colour morphs are interbreeding.

云斑蓝子鱼（Siganus fuscescens）与白斑蓝子鱼（Siganus canaliculatus）是一对形态与体色存在细微差异的近缘物种。针对这两个物种，研究已鉴定出三大线粒体DNA（mtDNA）进化支；但通过扩增片段长度多态性（AFLP）分析得到的个体聚类结果显示，个体聚集模式以地理分布为依据，而非基于形态差异，这提示不同体色表型的个体间存在相互交配现象。