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Cleaning symbiosis is a relationship between a pair of animals of different species, involving the removal and subsequent ingestion of ectoparasites, diseased and injured tissue, and unwanted food items from the surface of the host organism (the client) by the cleaning organism (the cleaner). [5]
The Coast Guard issued ballast water regulations in 2012. [14] Under the authority of the Clean Water Act, the Environmental Protection Agency (EPA) published its latest Vessel General Permit in 2013. The permit sets numeric ballast water discharge limits for commercial vessels 79 feet (24 m) in length or greater.
In boiler room No. 4, at around 01:20 according to survivor trimmer George Cavell, water began flooding in from the metal floor plates below, possibly indicating that the bottom of the ship had also been holed by the iceberg. The flow of water soon overwhelmed the pumps and forced the firemen and trimmers to evacuate the boiler room. [105]
A fish (pl.: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits.Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct placoderms and acanthodians.
MS Costa Concordia in Palma, Majorca, in 2011. Costa Concordia (call sign: IBHD, IMO number: 9320544, MMSI number: 247158500), with 3,206 passengers and 1,023 crew members on board, [1] was sailing off Isola del Giglio on the night of 13 January 2012, having begun a planned seven-day cruise from Civitavecchia, Lazio, Italy, to Savona and five other ports. [2]
In fish, the long bony cover for the gill (the operculum) can be used for pushing water. Some fish pump water using the operculum. Without an operculum, other methods, such as ram ventilation, are required. Some species of sharks use this system. When they swim, water flows into the mouth and across the gills.
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