Kelp
Kelps are large brown algae seaweeds that make up the order Laminariales. There are about 30 different genera.
Blue cod
Since "P. colias" are generalists, which means that they prey on various species instead of depending on only one species, habitats that are rich in diversity of species are also favoured by them. An example of this is the kelp forest which is often established on rock beds where it is also desirable for "P. colias". However, they can be also found in less species diverse habitats such as barren rock flats (4-12m deep) that are dominated by sea urchins grazing on algae.