Poseidon2910 - Introduction + Invertebrates

 Hello again,

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I have decided to present the best bits of a huge project that I have worked on for the best part of a decade, and never finished to my satisfaction. The original idea was for an earth-like ocean-covered planet, dominated entirely by creatures of earthly descent that could be thought of as sea monsters. It went through over 3 iterations, one of which became my Demons of the Deep project.

It eventually materialized as a large, earth-like water-world, covered by ocean, mostly shallow but also having trenches as deep as on Earth. The idea is that it was terraformed and seeded by time-travelling civilized, god-like aliens, using organisms from the history of Earth's evolution.

I tried my best to make as many unique and familiar lineages as I could, filling many niches found on earth, included in this were a few island chains which contained various radiations of Gulliverized, island-rule fauna.

Then I started changing the niches and what they contained over and over, and the whole thing was bogged down with a majority of species looking too similar to those of earth. After attempting to streamline it, I gave up, headhunted all the best ideas that I had drawn, and here I am presenting them.

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To begin with, we have the nebulous group, invertebrates, which are really just a grade of non-vertebrate animals that are not all closely related.


A larger, streamlined relative of the Phylliroe nudibranch, with large sensitive eyes, open ocean.


A deep sea piglett-squid that inflates is spine-covered body to deter predators.

A huge, round stubby Cirrate octopod, as large as a car.


A fair-sized Cirrate octopod that suspends itself, upside-down in the deep ocean, gathering marine snow which it eats.

A giant, attenuated Cranch squid, about 12 meters long.


A deep-sea cuttlefish that sits on the sea-floor on a tripod-like arm arrangement, in order to ambush small deep-sea invertebrates.


A tiny, 3mm long planktonic ammonoid, not a larva.


A ferocious mid-sized Belemnoid that uses its hypertrophied onychite claspers to seize prey.


A stubby, huge pelagic octopod as long as a man, open ocean.


A pelagic ammonite that snares prey with long dangling feeding arms.



An elongate, pelagic Vetulicolian.



A mid-sized, free-swimming descendant of brittle-stars.


A free-floating, pelagic descendant of Ammonicrinus.


A bottom-crawling, non-sessile Crinoid.

A small, free-swimming predatory Onychophoran.


A carcinized descendant of early Chelicerata.

A giant descendant of Medusa jellyfish that clings to kelp forests, mimicking it in order to snare prey.


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All images, designs and writing on this blog are the property of Timothy Donald Morris, do not use, reproduce, or copy them without my permission.
© Timothy Donald Morris 2023

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