These prehistoric-looking creatures are horseshoe crabs, whose highly prized blood has been harvested for medical treatment.

Here a baby and adult horseshoe crab are seen in Saint Petersburg on Florida's gulf coast.

Writes the filmer: "The horseshoe crab has nine eyes, 10 claws, 14 legs and blue blood worth about $15,000 a quart.

"They are harmless but look like those little face-huggers in the 'Alien' movie series.

"The Pokémon character Kabuto is based on a horseshoe crab."

The video shows a baby horseshoe crab and then an adult horseshoe crab. The adult has some barnacles on its butt. The Horseshoe crab's blood is highly valued in the medical industry. They are harmless but look like those little face-huggers in the "Alien" movie series.

The Pokémon character Kabuto is based on a horseshoe crab.

Any credit to See Through Canoe company are greatly appreciated. :-)