Across
1
Egg-laying mammal with a duck bill
5
Tallest living animal on Earth
6
Intelligent marine mammal
9
Largest mammal in the ocean
10
Graceful animal with antlers
Down
2
South American pack animal
3
Flightless bird that swims in cold regions
4
Fastest land animal
7
Slow-moving reptile with hard shell
8
Large animal with a horn on its nose
11
Soft sea creature that can sting
12
Striped big cat from Asia