Figuring Out The Problem
Mallory and Cliff both assumed that the creature on the iceberg was simply a seal and they had seen this situation several times before over their years of sailing. On the other hand, Allen was persistent that something was a bit too strange.

Figuring Out The Problem
Not A Seal
After sussing out the situation with binoculars, Allen stated that the creature was, in fact, not a seal at all judging by its appearance and its movements. This shocked the crew and they insisted on finding out exactly what it was on the iceberg.

Not A Seal