Symbiotic relationships are one of the most interesting parts of this hobby. A coral reef is a battlefield for real estate, however there are still these pockets of cooperation between completely different animals that is amazing.
These Red Sea Urchins are animals. Not a surprise! :). However, when abundant the urchins also become a substrate. And when their total surface area is calculated, it becomes apparent they can actually create a considerable area.
Dr. Shimek seeks to learn the secrets of whelks placing their eggs in the vicinity of anemones in the Northeast Pacific.
I was doomed from the get-go. My really formative years were during the post-Sputnik era, when I discovered speculative or science-fiction literature. As a result, I would have given anything to be able to travel to other, vastly different, worlds.