Both larval and adult barnacles have a single eye - although it's probably more of a "light sensor" than what we think of as an "eye" since it pretty much is only capable of sensing the difference between light and dark/shadow. In the nauplius (larva) it's a spot on top of the the barnacle on the end that would be considered the head. In the adult, the eye is developed/derived from the naupliar eye. Since barnacles attach themselves by their heads (kinda by their forheads) to the surface they are stuck to, the vestigial eye/light-sensor would be on the side, down near where the barnacle has attached itsself to a surface.
Barnacles
All arthropods are cold blooded.
The most well-known ones are crustaceans (crabs, lobsters, water fleas etc. but also barnacles!)
== == Animals with white fur and red eyes are called albinos. Albinos lack pigmentation in their skin and eyes. They eyes look pink because the lack of pigmentation, what you are seeing the the blood behind their eyes
Earthworms don't have eyes, but they do have light-sensitive cells scattered in their outer skin.
yes, just one
Bubbie!! "Flapjack. You know if I don't get my beauty sleep I get those nasty barnacles under my eyes." LOL!
Barnacles are crustaceans( a type of arthropods)
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."
Barnacles are shellfish that cling to rocks or ships hulls.
Barnacles live only in salt water.
There are more than 1,000 different species of barnacles.
Barnacles protect themselves by sticking to something sturdy.
The things that eat acorn barnacles are whelks which arte sea snails, mussels and some starfish all eat of feed on barnacles
You can remove dried barnacles from a fiberglass boat using a stainless steel scrubber or a pressure washer for large barnacles.
Barnacles can attach themselves to various watercraft including kayaks.