一个多样化的海洋鱼类社区展示了一场视觉盛宴，尤其是当被安置在充满五颜六色珊瑚的礁石系统中时。但是，在某些库存情况下，最好避免使用“典型”海洋社区（如果有的话）支持单物种甚至单个特定的坦克。
啊，但是，如果您将牲畜限制在一个物种或标本上，那不会成为坦克真正的Yawner吗？相反，有时将重点放在特定物种或个体上的系统是最令人着迷的观察。
以下是五种保证单种或单特性的情况：
1.害羞的专业喂食器
Seahorses, which are slow, awkward swimmers, shy by nature, and very specialized, methodical feeders, come to mind here. In your average community aquarium, these fish would basically be doomed, as they’d be unable to compete with bolder, faster-moving tankmates for food and would be unable to tolerate the brisk water movement typical of such systems. Not to mention, a community tank of any appreciable size would make it extremely difficult to provide the steady supply and high concentration of suitable food items necessary to sustain seahorses.
另一方面，在一个非常柔和的小型系统中，没有食物的竞争和适当的“搭便车柱”，一群海马可以使人真正令人着迷。
2.高侵略性物种
在海马的另一端，您的物种很漂亮，但也很大，好战，并且不愿意与任何其他鱼类（conspififics conspifics或杂种）“玩得不错”。其中包括几种触发鱼类，例如女王触发（巴利斯特兽医）和起伏的触发器（巴厘岛stapus undulatus）。如果您想保留这样的鱼，那么长期的唯一现实选择就是单独将标本放在一个合适的大型水箱中。
3.宠物状的捕食者
Here, the species that comes immediately to my mind isDiodon holocanthus, the spiny puffer, which can be almost puppy-like in its behavior toward its owner but may also be inclined to “sample” or consume tankmates. While it is possible to houseD. Holocanthus在一个由大型，自信的物种组成的社区中，其可观的成熟尺寸，潜在的nipp和宠物般的性质使其成为单个特定坦克的理想选择。
4.繁殖对
If you’re trying to encourage, say, a pair of clownfish to breed, it’s often best to give them a tank all to themselves rather than one shared with tankmates that may be perceived as competitors for food and real estate, thus potentially distracting the pair from the business at hand. Also keep in mind that post spawning, the breeding pair—or at least the female in the case of clownfish—will likely become highly aggressive toward any tankmates in defense of the eggs.
5.学校或殖民地
我在这里讨论的最后一个情况是容纳一种最佳或在学校中保存最令人印象深刻的视觉陈述的物种，例如各种Anthias物种，Chromis和主题我以前的帖子（Threadfin Cardinals）。各种颚鱼，在基质, would also fit in this category. That’s not to say schooling/colonial species can’t be kept in community tanks. Oftentimes, they can. But in many cases, limited tank size precludes the possibility of keeping heterospecific tankmates when the conspecific school or colony already amounts to a pretty significant bioload.
What am I forgetting?
So, fellow salties, what other circumstances do you think might warrant a species or single-specimen tank? Let us know in the comment section below!
