Across
1
Small spiny mammal
5
Flightless bird that swims in cold regions
6
Large North American buffalo
8
Wild dog-like animal of North America
9
Intelligent marine mammal
10
Striped big cat from Asia
12
Large animal with a horn on its nose
Down
2
Amphibian that leaps and croaks
3
Animal that builds dams
4
Large reptile found near rivers
7
Five-armed sea creature
11
Largest mammal in the ocean