It's common to see large predatory sharks come in and feed on schools of bait-fish - the odd thing was I didn't see any bait-fish at all!
大型肉食鱼类追逐捕食鱼群还算常见——但奇怪的是我根本没有看到鱼群。
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Adding suitable microbial fermented feed in bait in tilapia breeding could promote the growth, enhance the survival rate, decrease the feed coefficient and increase the economic benefits.