Ziphius cavirostris
Pale goose-shaped head, stubby dorsal, cookie-cutter scars. NOAA has recorded dives past 9,800 ft lasting over 3.5 hours.
Length/weight/lifespan/diet: NOAA Fisheries species page →
Newport & Long Beach operators share daily trip counts — you can see what was spotted before you book. Other operators don't publish daily reports.