It's going to be awkward when we have to explain to them why we call them "sperm whales." (From Wikipedia: "The name 'sperm whale' is a clipping of 'spermaceti whale'. Spermaceti, originally mistakenly identified as the whales' semen, is the semi-liquid, waxy substance found within the whale's head." It's one of the things we hunted them for.)
How First Contact With Whale Civilization Could Unfold
If we can learn to speak their language, what should we say?
theatlantic.com