How much sea otter are killed for hats in a year?

The sea otter population has significantly declined due to the fur trade, particularly in the 18th and 19th centuries when they were hunted for their fur, which was highly sought after for hats and clothing. However, today, hunting sea otters is illegal in most countries, and conservation efforts have been implemented to protect them. As a result, the number of sea otters killed for their fur has drastically decreased to virtually none per year. Current threats to sea otters are more related to environmental changes and habitat loss rather than direct hunting.