HONOLULU – More than 10,000 humpback whales migrate to Hawaiʻi each winter to breed, nurse calves and raise their young. As koholā, or humpback whale, season reaches its peak in Hawaiʻi the Go Slow – Whales Below initiative urges mariners to be mindful and exercise caution when out on the ocean, for the safety of the whales and everyone on the water.