The venom isn’t in the bite. It is instead in several extremely sharp spines on the back of the creature that are sharp enough to penetrate shoes. When you apply press down on the spines, they push in and the pressure makes the venom squirt out through the spines and into your body.
Photograph by Jeff Rotman/Getty Images Copyright National Geographic Society
The molluscs: Haliotis rubiginosa; Haliotis astricta; Haliotis viridis; Haliotis coccoradiata; Haliotis gemma; Haliotis excavata; Haliotis stomatiaeformis; Haliotis coneinna; Haliotis papulata; Haliotis jaenensis; Haliotis dubia; Haliotis sanguinea; Haliotis lauta; Haliotis lamellosa; Haliotis rugosa; Haliotis dringii; Haliotis rasacea; Haliotis tricostalis
From: ‘Illustrations conchyliologiques ou description et figures de toutes les coquilles connues vivantes et fossiles, classées suivant le système de Lamarck modifié d’après les progrès de la science et comprenant les genres nouveaux et les espèces rècemment découvertes’ (1842) by Jean-Charles Chenu
Atlantic Deer Cowries
Atlantic Deer Cowries are rarely seen on beaches.They are identified by a speckled orange-brown color, no spire, and a long, slit-like toothed aperture. These vegetarian grazers grow up to 6 inches and live on hard, rocky ledges where they hide in crevices, only coming out at night.
Crab shells are full of calcium and other nourishment, so most crabs make a meal of their discarded armor.
Some fish also use their swim bladder as an eardrum to pick up sounds. Others use it to amplify their own sounds.
A fish gulps water in through its mouth. The water then streams over its gills, which take the oxygen out of the water. Then the water goes back out through openings at the sides of the fish’s head.