What if Earth had an ecosystem designed by H.P. Lovecraft?

A few small details that came up while I was brainstorming. I'd appreciate any help in developing this idea further. <br><br>This ecosystem would almost certainly be prehistoric but who knows. <br><br>So the G’zorkian sea has a nutrient profile different from our own. Instead of carbon and oxygen, cycles of life are based around phosphorus, boron and other elements. There are no plants, or if there are they appear frequently. Instead the base of the food web consists of massive animal migration patterns that traverse the planet, depositing nutrient rich waste in periodic pulses that allow higher populations to thrive. Think cattle herds of wildebeest. <br><br>The periodic meteor showers that replenish these nutrients may have allowed this system to persist even in an ice age, and the presence of these migration events could have prevented the formation of glaciers by kicking up enough sediment to prevent the formation of snow. <br><br>I imagine some sort of massive burrowing species that travel inside the crust, thousands of miles at a time. They get fertilized from the inside out like sea cucumbers, but have never evolved brains. These are the base of the food web, massive tunneling worm creatures. Some feed on them from the bottom up, others from the top down. <br><br>They have massive skins that they shed periodically, which are then decomposed by a host of subterranean creatures. It’s like the ocean floor, but the water only comes in at high tide and has to be stored. Their nutrient rich waste is where the phosphorus and boron come from. <br><br>They can be tens of kilometers long, but the burrows are only slightly larger than a subway tunnel. The tunnel walls are coated with a substance like mucus but harder, that bioluminesces. They go dark when they aren’t fed for a while, which is assumed to be an adaptation to prevent the animals that feed on them from following their tunnels. <br><br>They deposit their waste in massive piles at the surface, which is the source of the periodic nutrient pulses that sustain life. In turn, their tunnel networks allow rainwater to flow through the crust and feed massive underground aquifers. <br><br>The animals that feed on these tunnelers have been known to sequester massive amounts of water, to the point where one species caused a worldwide flood by releasing its stored water and creating a sea that has persisted for millions of years. <br><br>The nutrients from these fertilizer piles are washed into the ocean and have created an ecosystem independent of our own food web. It’s hard to see them, because they reflect light instead of absorbing it in order to communicate. Any light that hits them is reflected back. They have been mistaken for sea monsters and ghost ships and are the basis for a lot of folklore. <br><br>They could have been the source of our food web if we hadn’t evolved as predators. They have been known to scald predators with high temperature fluids, and can release a cloud of boron dust that gets into the lungs of predators and dissolves them from the inside out. <br><br>They can’t actually move much, it’s a long process to burrow and they are often stuck in place for millions of years. They have been mistaken for mountains. <br><br>There’s evidence they have mutualisms with certain microorganisms that give them additional capabilities. Assimilation and manipulation of metals and even radioactives. Some have been known to create massive deposits of valuable metals.