In general, the size of the prey (fishes) increases with the fork length of the predator(Saurda tumbil or S. undosquamis).
被捕食对象的大小，随着捕食对象（多齿蛇鲻或花斑蛇鲻）叉长的增加而增大。
The fish is about 74 mm in fork length (body length measured from tip of snout to the fork of caudal) and 3g in body weight when one year old;
水丰水库的池沼公鱼一龄体长（到尾叉的体长，后同）74毫米，体重3克；
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