6ebbba77_Marine_habitats__principles__Living_in_the_sea
[Factor] Smelling [Living on the land] In order to 'smell', substances must be able to dissolve in both water and oil. They must also be able to evaporate in the air where they are carried in very low concentrations that are hard to detect. Yet some animals' sense of smell is amazing. [Living in the sea] 
In the sea, concentrations of smelly substances are much higher and thus easier to detect. The sea is full of smells. Smells pass easily from liquid to liquid. Some animals can smell a target at many kilometres distance.
Marine habitats, principles
Living in the sea