Most oxygen enters the starfish via diffusion into the tube feet (with the water vascular system), or the papulae (small sacs covering the upper body surface). Reproduce alone, or with a mate: Sea stars are capable of both sexual and asexual reproduction. Individual sea stars are male or female.
Specifically for keratosis pilaris, I would make extra certain that you are not eating foods with new-fangled vegetable oils such as corn, sunflower, vegetable a.k.a. soybean, grape seed, cottonseed AND canola oils. These non-traditional vegetable oils are packed with super unstable PUFAs (poly-unsaturated fatty acids).
Leafy green vegetables have contain higher amounts of vitamin K and one rule of thumb is to suspect that green veggies, cabbages and lettuces are high in Vitamin K. Also certain legumes like peanuts and peas might cause problems. Certain vegetable oils have high amounts of vitamin K. Foods that are low in vitamin K include roots, bulbs, tubers, some fruits, and fruit juices. Cereals, grains, and other milled products are low in vitamin K. Keep in mind that the amount of foods you eat with vitamin K add up. So if you eat a more foods that contain medium. amounts of vitamin K in a particular day, your vitamin K intake will be high for that day.