it indeed evolved to be able to try to escape, but it wasn't quite evolved to successfully escape! then why it evolved so? it's because it evolved to give what it loved!
QS. 3:92. Never will you attain the righteousness until you spend from what you love. And whatever you spend - indeed, Allah is Knowing of it.
or maybe you can ask to Mr. Edison, why did he say that God made it, for him catch & eat!
O.K,I will tell you of one peculiar phenomenon/practice of self sacrifice or human sacrifice observed amongst Hindus even upto the beginnings or end of Vijayanagar Empire.There used to exist a tradition where a pious or chaste woman would offer herself to Lord Shiva and dance unto death so that Shiva might bless the village or that geographical area with abundant rain in times of famine.You can also watch it in the video given below.
So would you consider that O.K.Also would you consider Suttee ,the practice of a widow immolating herself upon the pyre of her husband or widow sacrifice O.K?If so why did the Muslim sultans try their level best to suppress these traditions?
Sacrifice of Jephtah in the Bible is another case in point.If God wants so,you must even offer your daughter as a burnt thanksgiving sacrifice.Still that did not prevent the British from suppressing Suttee by making a huge issue out of it.
In these traditions,the sacrifice must be voluntary and these occurred in small numbers.But sacrifice of fish for human is not voluntary.So stop saying that God made it just for the sake of humans.It too feels the same pain as does a human while taking up the so called opportunity of serving the human being as food.