英语高手进！帮我把这段文字翻译成英语好吗？急

He has finally got the big malin fish, but the fish was too big that pulled his boad for 3 days and exhausted.The fish was killed and tied up on the side. On the way back it's always attacted by sharks. At the end back to the harbor, there's only some fish head and tail and one backbone.

at last , a big marlin swallowed the bait , but, the fish is so big that it dragged his boat for three days before it's totally exhausted.
then,he killed it and trussed it up to the boat side.
whereas, the shark attack, during his way home , leave him nothing but the head 、tail and chine of the fish when he arrived the harbor.

查了金山词霸。。有几个词不知道用的是不是准确。

He snared to ascend a big marlin finally, but this fish is really too big, dragging along his boat's on the water three genius utterly exhausteds, was killed by him to bind at part, is assaulted by shark again and again in return the distance, remain a fish head fish tail and a spine just while return