Some individuals would therefore not have been caught, since no baited hooks would have been available to trap them, leading to an underestimate of fish stocks in the past.
因为没有可利用的带诱饵的钩子来捕捉它们，个别的鱼没有被捕获，这导致过去人们低估了鱼类的数量。
In 2009 a stone-walled ancient fish trap was spotted on Google Earth in the Teifi estuary.
在2009年，一个古代鱼化石在Teifiestuary被Google地图发现。
Dolphins first trap small fish in large conch shells with their rostrums (beaks). They then bring the shells to the surface and shake them.
海豚先用它们的吻突将小鱼赶到大海螺壳中，然后将螺壳带出水面并晃动。
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