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By Biofauna25
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Plios species use their strong flippers in tangent for endurance, or in unison for amazing bursts of speed; they can also coordinate them individually for astounding aquatic acrobatics.  Their paraglossae and an extension of the head have become hardened and similar to a three-part bill for snapping up or tearing into their prey.  These highly efficient predators have excellent senses (aside from their sight, which is relatively poor), their flippers picking up chemical signatures (scents/tastes), patches on either side of their body sensing pressure, and a lateral line that picks up electrical signals; these senses allow them to find their prey in even the lightless deep sea or in murky, storm-churned waters.  The faster species (able tro swim at nearly 20 km/hr) travel great distances while tracking schools of their prey, while the larger/stronger ones are ambush predators that attack their prey from below.

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anonymous's avatar
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ImmaCatastrophe's avatar
Nice! Reminds me of plesiosaurs...
Biofauna25's avatar
Yeah, it was the short-necked plesiosaurs (pliosars) that I based them on.
kartracer57's avatar
That's probably where their name derives from. 
ImmaCatastrophe's avatar
Yeah i think so too.