Sea Level
1/ +6 near the top of the lighthouse.
2/ +3 at the mouth of the sea-gull.
3/ -8 at the crab.
4/ 6metres from seagull to Yellow fish.
5/ 7 metres from the Turtle to the Crab.
6/ The Sea-horse is at a depth of 5 metres.
7/ The Seagull is at a height of 3 metres.
8/ There's 8 metres from the seagull to the sea-horse.
9/ The cloud is 4 metres high.