Say “triggerfish” to a group of experienced salties, and you’re apt to evoke bloodcurdling memories of once-kept triggers massacring fellow fish, shredding sessile invertebrates, mangling submerged equipment, toppling rockwork, or even biting the hand that feeds them. Let’s face it, triggers don’t exactly have a reputation for stellar behavior in aquariums.
但是，并非所有的扳手都是野蛮的野蛮人！尼日尔·奥多努斯（Odonus Niger）, the popular Niger or red-toothed trigger from the Indo-Pacific, is usually quite peaceful and well-mannered—by triggerfish standards, anyway. It’s also quite hardy, adaptable, and beautiful.
Physical characteristics
O.尼日尔有横向压缩，模糊的足球形状（美式足球，即）触发器的典型身体计划；嘴巴上弯曲的牙齿；不断颤抖的背和肛门鳍；一个新月形的尾巴，会从每个叶子上形成长长的尾随延伸；以及可以锁定在直立位置的修改后的背脊，使扳机可以牢固地楔入礁石缝隙中。
问我这条鱼是什么颜色，我不得不说我真的不能告诉你 - 我有一只！在大多数物种的照片中，O.尼日尔looks dark blue overall with a greenish face, but depending on the lighting and my position relative to the tank, my specimen can appear brownish blue, blue-green, purplish, or even solid black.
piscine性格（pisconality？）
像河豚一样，包括尼日尔（Niger）的许多扳机鱼可能会变得非常像宠物一样，尤其是当他们发现您是他们食物的来源时。我的经常像一只旺盛的小狗一样在前玻璃杯上摇摆，如果我开始看见，但不要立即接近坦克。
但是，不要让那种狗般的热情欺骗您，以手动喂食该物种。这些牙齿的意思是生意，而O. Niger会咬人（毕竟这是一个触发！）。另外，请非常小心，并在您将手放在水箱中进行清洁时知道扳机的位置，等等。
住房
尼日尔扳机鱼确实很大。最大潜在尺寸超过19英寸，计算上述尾鳍扩展，尽管大多数圈养标本不会达到这一长度。尽管如此，我不建议将一个比125加仑的水箱小的东西保留在任何地方。
喂养
O.尼日尔通常，几乎没有诱因，可以适应水族馆的票价，并且会接受各种适当尺寸的新鲜和冷冻食品以及干燥的颗粒。我的标本甚至会撕成我为唐提供的干燥海洋藻类床单。
This species is, however, prone to hunger strikes when something is not to its liking for one reason or another. My specimen ate everything I offered with gusto right after I purchased it and placed it in quarantine. Then, for no reason I could discern, it stopped eating just as its four-week quarantine period ended and I was getting ready to transfer it to my display tank. No worries though! After a few days and some coaxing with fresh squid tentacles, it came back around and hasn’t stopped eating since.
O.尼日尔会和坦克友一起玩吗？
与许多臭名昭著的激进的触发器, such as the undulate, queen, and clown triggers, the Niger trigger will tend to coexist peacefully with most moderately aggressive tankmates that are too large to eat. However, it’s very important to research potential tankmates carefully and to make sure you introduce them in the order of least aggressive to most aggressive.
Also, I would be remiss if I didn’t mention that despite the Niger trigger’s relatively peaceful reputation, it’s not unheard of for the occasional specimen to “go rogue” and turn on tankmates. Never let your guard down completely with this trigger in your community tank.
一般而言，除了小型的无脊椎动物外，尼日尔扳机是安全的，但是鉴于其大尺寸和相称的废物生产，我不会认为这是大多数礁石系统的理想选择。
您会尝试扳机吗？
那么，你怎么说盐？你会尝试保留吗尼日尔·奥多努斯（Odonus Niger）or another triggerfish? What experiences have you had—good or bad—with triggers? Let us know in the comments section below.
