How might a starfish's essential functions be affected if it were lacking pedicellaria? (think respiration and water-vascular system)I found out...

Star fish have bear-trap or valve-like structures known as
pedicellariae. These have been noticed to have several functions. In many kinds of
starfish they do not allow algae and plankton to settle on the surface. Some starfish
have been observed to use these to capture active krill prey and small fish with their
pedicellariae.

Without the pedicellariae, the starfish will
not be able to perform the functions for which they use the pedicellariae. In addition
to not allowing them to catch prey, the lack of pedicellariae will result in algae and
plankton settling on the starfish. This makes the starfish more susceptible to being
attacked by prey. Also, as the matter which settles on their bodies decays it results in
the growth of bacteria and other organisms that could harm the
starfish.