Capt. Bob Bartlett at the Bronx Zoo with walrus 'Peel' and with young children in the 1930s

The video takes place at the Bronx Zoo, where the presenter introduces the audience to a baby walrus named Peel. The introduction is repeated, emphasizing the unique characteristics of Peel, who is described as having raised a whisker in the far north.

What does the speaker refer to when mentioning 'big girls and boys'?

What is unique about the baby walrus mentioned?