Complex sentence: Blackfish is revered so highly in Tlingit culture because of his apparent affinity with humans-he represents an extremely powerful force of nature, deadly and terrifying to every creature except man, whom he is said to look after.
Split into simpler sentences: Blackfish is revered so highly in Tlingit culture because of his apparent affinity with humans. He represents an extremely powerful force of nature, deadly and terrifying to every creature except man, whom he is said to look after.