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<blockquote data-quote="Cleon" data-source="post: 5465093" data-attributes="member: 57383">Funny, I was sure I had Aquatic in my last draft. I though I copy-and-pasted the Types of the Marrella.As for surviving on land, I think this one will stick to the water.Upon reflection, I'm wondering whether we should cut out the Climb speed and leave it as a swimmer &amp; crawler......no, if it's got a mollusc-style foot it would be a good climber, since it can use it to grip vertical surfaces.Tricky. Its body plan doesn't match well to anything living so we don't have anything to compare it to.Still, it's a free swimmer so must have the same density as water. It's roughly 18' long and 6' wide. If we knew its thickness we can calculate its mass. Unfortunately, there's no way to tell from the fossil.It's compared to a flatworm, which have bodies about one twentieth as thick as their length (or about 30-50% as thick as their width).That suggests an average thickness of about 9 inches to a foot, which gives a volume of ... 75-100 cubic feet, or 4,700 to 6,250 pounds weight.Call it 5000 pounds.That's over the standard weights for a Large creature, but there are&nbsp; Oozes and other living things that are overweight for their Size.Incidentally, that's about the weight of a big (~25' ft.) manta ray, a creature their swimming style is compared to.&quot;A typical odontogriphus is about 18 feet long and weighs up to 5,000 pounds, most of its 6 foot wide body is less than a foot thick.&quot;</blockquote>

[QUOTE="Cleon, post: 5465093, member: 57383"] Funny, I was sure I had Aquatic in my last draft. I though I copy-and-pasted the Types of the Marrella. As for surviving on land, I think this one will stick to the water. Upon reflection, I'm wondering whether we should cut out the Climb speed and leave it as a swimmer & crawler... ...no, if it's got a mollusc-style foot it would be a good climber, since it can use it to grip vertical surfaces. Tricky. Its body plan doesn't match well to anything living so we don't have anything to compare it to. Still, it's a free swimmer so [B][I]must[/I][/B] have the same density as water. It's roughly 18' long and 6' wide. If we knew its thickness we can calculate its mass. Unfortunately, there's no way to tell from the fossil. It's compared to a flatworm, which have bodies about one twentieth as thick as their length (or about 30-50% as thick as their width). That suggests an average thickness of about 9 inches to a foot, which gives a volume of ... 75-100 cubic feet, or 4,700 to 6,250 pounds weight. Call it 5000 pounds. That's over the standard weights for a Large creature, but there are Oozes and other living things that are overweight for their Size. Incidentally, that's about the weight of a big (~25' ft.) manta ray, a creature their swimming style is compared to. "A typical odontogriphus is about 18 feet long and weighs up to 5,000 pounds, most of its 6 foot wide body is less than a foot thick." [/QUOTE]

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