From my brief research utilizing Google I was able to gather that it is a combination of B complex vitamins (mainly vitamin E) and zinc that gives kelp its effect on hair. Due to kelp containing iodine it also has a positive effect on the thyroid in reasonable amounts. This is due to iodine's role in the generation of the hormone thyroxin. Thyroxin influences how long hair stays in the dormant state before it re-enters a growth state. However, high levels of thyroxin can cause damage to the thyroid (so don't drink a bottle of iodine thinking that sh!t's gonna make your hair grow).
sea urchins eat kelp.
Fish, birds, octopi, and sea otters eats Kelp crabs.
kelp crab is stronger
Sea otters tangle themselves up in the kelp, while they sleep, so they do not float away
The common Kelp as we know grows in sea water.
Killer whales eat kelp from time to time. Other animals that eat kelp include sea otters and sea urchins.
The predators of bull kelp are sea urchins.
Yes, sea otters have a mutualistic relationship with kelp. Sea otters control sea urchin populations by feeding on them, preventing overgrazing on kelp forests. In return, kelp provides a habitat for sea otters and helps stabilize the marine ecosystem.
sea kelp
The sea urchin primarily feeds on kelp as its main diet. They play a crucial role in controlling kelp forest ecosystems by grazing on the blades of kelp plants.
When sea urchins are not present in the ecosystem kelp forests thrive.
The kelp uses the sea urchins to keep it in check, from growing too much. However, the sea urchins eat kelp, so they destroy kelp growth. Also, sea otters eat urchins, and they live in the kelp forest.