Horseshoe

... about 200 modern Orthonectida Straight swim Single layer of ciliated cells surrounding a mass of sex cells about 20 Phoronida Zeus's mistress Horseshoe worms U-shaped gut 20 Placozoa Plate animals 1 Platyhelminthes Flat worms Flat worms about 25,000[10] Porifera Pore bearer Sponges Perforated ...

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The horseshoe crab has blue blood! These odd arthropods have copper-containing protein hemocyanin instead of hemoglobin, and it is indeed blue - although when oxygenated. Although this has nothing to do with human blood, it ...

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... expedition as well, some very interesting finds. This creature does look VERY VERY similar to trilobites. I can tell you that it is not a horseshoe crab though, we know this because trilobites have horizontal segments in the dorsal region of their abdomen region, horseshoe crabs do not. ...

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That sure does look like a trilobite, but they went extinct some 400 MYA, so I would think it is some form of horseshoe crab. I would have to agree that there is no way that is a trilobite, a horseshoe crab is definitely the more likely option.

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That sure does look like a trilobite, but they went extinct some 400 MYA, so I would think it is some form of horseshoe crab.

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