'Underwater Wild' is a new South African book from the makers of the Netflix documentary 'My Octopus Teacher.' Preview it here.
It is possible to track what a young abalone has eaten by looking at the color pattern on its shell. Representing a very rare case in nature, this animal has kept changing its diet, from bacteria and algal sporelings to kelp and back again. The red is associated with the microbial finds and the blue with the kelp. Shells, and even the bones found in fish heads , leave tracks from the past.by Craig Foster and Ross Frylinck. Copyright © 2018, 2021 by Quivertree Publications.
Sitting quietly on the rocks together, we also began to observe very interesting animal behavior in the pools. We watched sea anemones wage slow-motion war, lashing each other with toxic stinging cells. On one occasion we observed a large sea star creeping over a rock, chasing fine top-shell snails. As they reached the edge of the rock, instead of gliding over the edge, the snails jumped into the abyss.
I thought a bit about purposelessness and how play, by its very nature, is aimless. Watching these small creatures search for their next meals, I began to see that nature has a playful side. I started to think that if we all had the same aimless, playful attitude, then we would be more in sync with Craig’s “original design.
On one dive, I found a striped catshark wedged in a small cave. Curiously, a perfect strip of sand ran across its head. On reviewing a photo of the shark’s head, I realized that the line of sand was in fact the trail of another animal, a mollusk. These mollusks leave slime trails wherever they go, and fine particles of sand from the water column stick to them.
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