shoal
/ʃəul; ʃol/ n
great number of fish swimming together 鱼群
a shoal of herring, cod, etc 一群鲱鱼、 鳕鱼等
swimming in shoals （鱼）成群地游著
(fig 比喻) Shoals of tourists come here in the summer. 这里夏季游人如鲫. shoal, v [I]
(of fish) form a shoal or shoals （指鱼）成群.