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Free-living copepods of the orders Calanoida, Cyclopoida, and Harpacticoida typically have a short, cylindrical body, with a rounded or beaked head, although considerable variation exists in this pattern. The head is fused with the first one or two thoracic segments, while the remainder of the thorax has three to five segments, each with limbs.
Dioithona oculata is native to the Indo-Pacific region but has expanded its range into the Atlantic. Its range includes Madagascar, the Gulf of Oman, the Persian Gulf, lagoons in the Laccadives, Rodrigues, the Nicobar Islands, Christmas Island, the Strait of Malacca, the Yellow Sea, the East China Sea, Taiwan, South Korea, Japan, the Caroline Islands, the Palau Islands, the Great Barrier Reef ...
Monstrilloida is an order of copepods with a cosmopolitan distribution in the world's oceans. The order contains a single family, Monstrillidae. [2] The name of the first ever described genus Monstrilla is derived from Latin, meaning "tiny monster", because the lack of usual diagnostic features of copepods puzzled early taxonomists.
Like other copepods in the order Cyclopoida, these are small, planktonic, free-living animals.They are distinguished from closely related groups by having the first antenna shorter than the combined length of the head and thorax, the second antenna being unbranched. [3]
Ergasilus is a genus of copepod crustaceans occurring in both the ocean and fresh water, often called gill lice. The females are parasitic upon the gills of fishes. Being copepods, gill lice have a single median eye on their head. The second antennae are modified into prehensile pincers. Male gill lice are free-living. [2] Species include: [1]
It is observed that the Southern California populations are able to handle higher temperatures than those living further north. [6] This pattern of higher thermal tolerance in southern populations mirrors the temperature variation seen in copepod pools of southern populations experiencing more extreme high temperatures (over 40 °C or 104 °F ...
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The adult female copepod is parasitic while the adult male is free-living. The head and neck of the female burrow into the host fish and large, hard cysts are formed in the host's organs. [4] The attachment is made by hooking to the fish with the prehensile second antennae, the remaining parts of the copepod's body hanging free. [5]