Complex sentence: Though not highly dangerous to humans, the pink whipray's venomous sting makes it difficult to handle when thrashing in a fishing net, and usually it must be thrown overboard before the rest of the catch can be sorted.
Split into simpler sentences: Though not highly dangerous to humans, the pink whipray's venomous sting makes it difficult to handle when it is thrashing in a fishing net. Usually, it must be thrown overboard before the rest of the catch can be sorted.