At the bottom of the model’s head, you can see the throat grooves that are so characteristic of baleen whales. These grooves allow the whale to take in a huge gulp of water (the throat expands) and then force the water out through the baleen. The food is trapped and licked off by the tongue.
The relatively large fins and the bumps on the head indicate that this creature is an ancestor of the humpback whale, which occasionally appears in the North Sea today (such as Johanna, who stranded on Texel a few years ago). The massive fin is essentially just an arm, similar to a human’s, except the elbow cannot move, and all the fingers have fused into a single structure.