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In sharks, the ampullae of Lorenzini are electroreceptor organs. They number in the hundreds to thousands. Sharks use the ampullae of Lorenzini to detect the electromagnetic fields that all living things produce. [25] This helps sharks (particularly the hammerhead shark) find prey. The shark has the greatest electrical sensitivity of any animal.
Passive electroreception using ampullae is an ancestral trait in the vertebrates, meaning that it was present in their last common ancestor. [7] Ampullae of Lorenzini are present in cartilaginous fishes (sharks, rays, and chimaeras), lungfishes, bichirs, coelacanths, sturgeons, paddlefishes, aquatic salamanders, and caecilians.
In the ocean deeps, a whitetip shark named Julius and his friend Pup the brownbanded bamboo shark play around the ocean bed, when two human divers steal several shark eggs (Pup's siblings) from the reef, despite Pup's efforts to prevent it. To light up the Pup, Julius takes him to his sunken ship for dinner, but Pup is too upset to eat anything.
The song "Goodbye" features guitar work from Travis Montgomery from Threat Signal. The song "Tears of Norris" features a piano composition by Diego Farias from Volumes. February 12, 2012 the label released the 'Swimming With Sharks Metal Compilation Volume 2', featuring a track from the band Feed Her To The Sharks from Australia among many others.
The electroreceptors of monotremes consist of free nerve endings located in the mucous glands of the snout. Among the monotremes, the platypus (Ornithorhynchus anatinus) has the most acute electric sense. [37] [38] The platypus localises its prey using almost 40,000 electroreceptors arranged in front-to-back stripes along the bill. [34]
"Sharks inhabit pretty much every ocean, every sea, every marine environment on the globe, so if you're speaking to kids, it's about them paying attention to what's happening in and around the ...
Aces around, dix or double pinochles. Score points by trick-taking and also by forming combinations of cards into melds.
Shark migration patterns may be even more complex than in birds, with many sharks covering entire ocean basins. Sharks can be highly social, remaining in large schools. Sometimes more than 100 scalloped hammerheads congregate around seamounts and islands, e.g., in the Gulf of California. [39] Cross-species social hierarchies exist.