All sharks need to keep moving to pass water over their gills
Some sharks can lay and keep their mouth going to push/pump water past their gills.
it is only not true sharks which don't.
So you're saying if it can stop then it's not a true shark?? I beg to differ and a bamboo shark IS a true shark and they can rest on the ocean floor, just like they do in aquaria.
Kingdom Animalia -- Animal, animals, animaux
Phylum Chordata -- chordates, cordado, cordés
Subphylum Vertebrata -- vertebrado, vertebrates, vertébrés
Class Chondrichthyes -- cartilaginous fishes, condrictes, peixe cartilaginoso, poissons cartilagineux, raies, rays, requins, sharks, tubarão
Subclass Elasmobranchii -- cartilaginous fishes, rays, sharks, skates, torpedoes
Superorder Euselachii
Order Orectolobiformes -- carpet sharks, gatas nodrizas, requins-tapis, tiburones tapiceros
Family Hemiscylliidae Gill, 1862 -- bamboo sharks, longtailed carpetsharks
Genus Chiloscyllium Müller and Henle, 1837
Species Chiloscyllium punctatum Müller and Henle, 1838 -- brownbanded bambooshark
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here's the clasification link
http
/www.itis.gov/servlet/SingleRpt/Sing..._credRating=All