Yes; some few species are parasites.
A few examples of parasites are tapeworms, fleas, and barnacles.....
They aren't symbiotic : the barnacles (crustaceans related to crabs) are parasites on the whale's skin, and will also attach to boats, docks, and other marine locations.
Though often described as parasites, the relationship is an example of obligate commensalism, as the barnacles neither harm, nor benefit, their host.
Barnacles are crustaceans( a type of arthropods)
Commensalism is a type of symbiotic relationship where one organism benefits while the other is neither helped nor harmed. An example is the relationship between barnacles and whales. Barnacles attach themselves to the skin of whales, gaining a stable surface to live on and access to food particles in the water. The whales are not affected by the barnacles and may even benefit from the barnacles removing parasites from their skin. This demonstrates commensalism in nature as one organism benefits without causing harm or receiving any benefit in return.
commensalism
Yes, "as rough as the barnacles" is a simile. It compares the roughness of something to the rough texture of barnacles using the word "as."
There are more than 1,000 different species of barnacles.
Barnacles protect themselves by sticking to something sturdy.
Barnacles are shellfish that cling to rocks or ships hulls.
Barnacles live only in salt water.
An example of commensalism is the relationship between barnacles and whales. Barnacles attach themselves to the skin of whales and benefit by getting a free ride through the water and access to nutrients. The whales are not significantly affected by the presence of the barnacles.