The scientists observed that the tetras that normally spend time in the light do sleep soundly at night, resting on the bottom of their tanks.

科学家观察发现，接触阳光时长正常的鱼类在晚上会在鱼缸底部睡得很安稳。

Angelfish are an easy - to - keep cichlid species. they should not be kept with neons or cardinal tetras, though, as these tetras are a delicacy for the larger angelfish.

神仙鱼是易于饲养的慈鲷科鱼种。但是不应将它们与霓虹灯或红莲灯一起饲养，因为这些灯科鱼对体型较大的神仙鱼来说是一种美味佳肴。

Visiting Jem Aquatics shop I saw some pretty young Cardinal Tetras from a recent shipment. The fish were in excellent condition, of good shape and young, just ready and promising.

我在逛Jem 水族店时看到一些新进的漂亮的小红莲灯，这些鱼的状态非常好，体型好，处于成长期很有前景。