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Shellfish allergy is among the most common food allergies."Shellfish" is a colloquial and fisheries term for aquatic invertebrates used as food, including various species of molluscs such as clams, mussels, oysters and scallops, crustaceans such as shrimp, lobsters and crabs, and cephalopods such as squid and octopus.
The study of cephalopods is a branch of malacology known as teuthology. Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids . The class now contains two, only distantly related, extant subclasses: Coleoidea , which includes octopuses , squid , and cuttlefish ; and Nautiloidea , represented by Nautilus ...
Unlike mammals, the red blood cells of fish have DNA, and can become infected with viruses. The fish develop pale gills, and may swim close to the water surface, gulping for air. However, the disease can also develop without the fish showing any external signs of illness, the fish maintain a normal appetite, and then they suddenly die.
Uroteuthis duvaucelii, also known as the Indian Ocean squid or Indian squid, is an Indo-West Pacific species of squid with a wide range throughout the Indian Ocean to Malaysia and the South China Sea, and is also present in the Red Sea and the Arabian Sea.
In Mexico, they are known as diablo rojo (Spanish for 'red devil'): Local fishermen's tales claim that people who fell into the waters were devoured within minutes by packs of squid. Wildlife filmmaker Scott Cassell made the documentary "Humboldt: The Man-eating Squid" for the Dangerous Waters series of the Discovery Channel .
The squid’s nerves and muscles control whether the sac is expanded or contracted. When it expands, it’s like a balloon filling up with a colored liquid. ... In the murky ocean twilight zone ...
The bacteria are fed sugar and amino acid by the squid and in return hide the squid's silhouette when viewed from below, counter-illuminating it by matching the amount of light hitting the top of the mantle. [150] The squid serves as a model organism for animal-bacterial symbiosis and its relationship with the bacteria has been widely studied.
A group of friends exploring the waters off La Jolla Cove on Saturday came across a sea creature unlike anything they'd ever seen: a 12-foot-long rare fish from the depths of the ocean.