月光鱼是热带鱼中一个重要品种，它和孔雀鱼一样小巧玲珑，五光十色，惹人喜爱。月光鱼体长鱼体长4~6厘米，它的适应性和繁殖能力都很强。它的特点是能与剑尾鱼类杂交，繁殖出新的品种。常见的月光鱼品种有：红月光鱼、蓝月光鱼、红鳍金月光鱼、金头月光鱼、双鳍月光鱼、帆鳍月光鱼、金头帆鳍月光鱼等。
男孩和他父亲看着这条漂亮的鱼，鱼在月光下跳上跳下。
The boy and his father looked at the handsome fish, the fish jumped up and down in the moonlight.
男孩儿和他父亲看着这条漂亮的鱼，它的鱼鳃在月光下一张一翕。
The boy and his father looked at the handsome fish gills playing back and forth in the moonlight.
男孩和他父亲看着这条漂亮的鱼，鱼鳃在月光下一张一翕。
The boy and his father looked at the handsome fish, gills playing back and forth in the moonlight.
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