Mind your own beeswax net citizen.
I see no endangered fish in picture. Could have been taken anywhere in Asia.
You need hard facts before you start convicting someone net citizen.
Best to pay the 6K baht. If you get arrested then there are more crooked cops involved. Hence, multiple that 6K by the number of crooked cops that need to be paid off. It can escalate well over 30K in a very short time.