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The sucking disc begins to show when the young fish are about 1 cm (0.4 in) long. When the remora reaches about 3 cm (1.2 in), the disc is fully formed and the remora can then attach to other animals. The remora's lower jaw projects beyond the upper, and the animal lacks a swim bladder. [9] Some remoras associate with specific host species.
The common remora (Remora remora) is a pelagic marine fish [3] belonging to the family Echeneidae.The dorsal fin, which has 22 to 26 soft rays, acts as a suction cup, creating a vacuum [4] to allow the fish to attach to larger marine animals, such as whales, dolphins, sharks, and sea turtles.
Remora are specially adapted to attach themselves to larger fish (or other animals, in this case a sea turtle) that provide locomotion and food.. Commensalism is a long-term biological interaction in which members of one species gain benefits while those of the other species neither benefit nor are harmed. [1]
The whalesucker (Remora australis) is a species of remora in the family Echeneidae, so named because it attaches itself exclusively to cetaceans, in a mutualistic interaction. It is found worldwide in tropical and warm waters; in the Gulf of Mexico and western Atlantic Ocean , it occurs from Texas to Brazil , and in the eastern Pacific Ocean ...
Lamprey – Uses teeth to attach itself to a host. The sucker-like mouth is generally termed as an "oral disk." Remora – Sometimes known as 'suckerfish', remora use a modified dorsal fin to stick onto objects and other animals. Leech – The anterior portion (not the mouth) of this animal is modified to attach itself to a host.
Once C. exigua replaces the tongue, some feed on the host's blood and many others feed on fish mucus. [clarification needed] In the event of the death of the host fish, C. exigua, after some time, detaches itself from the tongue stub and leaves the fish's oral cavity. It can then be seen clinging to its head or body externally.
The lamprey uses its suction cup-like mouth to attach itself to the skin of a fish and rasps away tissue with its sharp, probing tongue and keratinized teeth. A fluid produced in the lamprey's mouth, called lamphredin, [12] prevents the victim's blood from clotting. Victims typically die from excessive blood loss or infection.
Phoresis or phoresy is a temporary commensalistic relationship when an organism (a phoront or phoretic) attaches itself to a host organism solely for travel. [2] It has been seen in ticks and mites since the 18th century, [3] and in fossils 320 million years old. [2]