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Jellyfish, also known as sea jellies, are the medusa -phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals, although a few are anchored to the seabed by stalks rather than being motile. They are made of an umbrella-shaped main body made of ...
Pain in crustaceans. Close up of the head of a live lobster. There is a scientific debate which questions whether crustaceans experience pain. It is a complex mental state, with a distinct perceptual quality but also associated with suffering, which is an emotional state.
Rhopalium. Moon jelly (Aurelia aurita) with rhopalia visible in indentations of rim. Rhopalia (singular: rhopalium) from Ancient Greek ῥόπαλον (rhópalon) 'club' are small sensory structures of certain Scyphozoan (true jellyfish) and Cubozoan (box jellyfish) species.
You’re blissfully splashing in the ocean and feel a pinch. Or you’re strolling along the beach and step on something sharp. When you’re out at the beach, it’s important to remember that ...
Caribbean box jellyfish, animals that may appear to float through life aimlessly and don’t have a central brain, still have the ability to learn rapidly and retain information, new research has ...
It has been argued that fish cannot feel pain because they do not have a sufficient density of appropriate nerve fibres. A typical human cutaneous nerve contains 83% Group C nerve fibres, [ 114 ] however, the same nerves in humans with congenital insensitivity to pain have only 24–28% C-type fibres. [ 114 ]
Pacific sea nettles, Chrysaora fuscescens. Cnidaria (/ n ɪ ˈ d ɛər i ə, n aɪ-/ nih-DAIR-ee-ə, NY-) [4] is a phylum under kingdom Animalia containing over 11,000 species [5] of aquatic animals found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites.
Sometimes the words that you say don't necessarily represent exactly how you feel, but you're trying to find out how you do feel. Listening, from family members, is really important.