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Sea slugs respire through a gill (or ctenidium). Aquatic respiration is the process whereby an aquatic organism exchanges respiratory gases with water, obtaining oxygen from oxygen dissolved in water and excreting carbon dioxide and some other metabolic waste products into the water.
Ice is produced in various shapes; crushed ice and ice flakes, plates, tubes and blocks are commonly used to cool fish. [6] Particularly effective is slurry ice, made from microcrystals of ice formed and suspended within a solution of water and a freezing point depressant, such as common salt. [7] A more recent development is pumpable ice ...
Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks [a] (/ ˈ m ɒ l ə s k s /). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda . [ 5 ]
Siphons in molluscs are tube-like structures in which water (or, more rarely, air) flows. The water flow is used for one or more purposes such as locomotion, feeding, respiration, and reproduction. The siphon is part of the mantle of the mollusc, and the water flow is directed to (or from) the mantle cavity. A single siphon occurs in some ...
They remain in warm water only long enough to obtain food, and then return to cooler areas where their metabolism can operate more slowly. [ 31 ] [ 32 ] [ 33 ] Alternatively, organisms feeding on the bottom in cold water during the day may migrate to surface waters at night in order to digest their meal at warmer temperatures.
To test the ice, Peterson recommended a few steps: Choose where you fish wisely - do not go out on ice that has formed on a river or other body of moving water, as the water there does not freeze ...
Freshwater bivalves are filter feeders and provide an ecological service by improving water quality in the bodies of water they inhabit, such as rivers, lakes, and wetlands. [5] Water quality is improved by filtering out fine particles of silt, organic matter, and heavy metals as well as bacteria and phytoplankton in the water column to reduce ...
Florida’s marine life attracts people from all over the world — but what happens if someone gets too comfortable with the state’s natural wonders?