Differences

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--- fish [2021/05/27 11:08]
rapidplatypus [The Picasso Triggerfish]
+++ fish [2022/07/20 05:17] (current)
aga
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 ====== Fish ======
-==== The toothless Garra Rufa ====
+==== Freshwater sturgeon ====
-[[garra_rufa|]]
+The American paddlefish, polychaete, or paddlefish (Polyodon spathula) is a species of freshwater sturgeon in the paddlefish family. It is found in the Mississippi River basin and Lake Huron.  [([[https://www.britannica.com/animal/American-paddlefish|Britannica]])]
-==== The candiru ====
-[[candiru|]]
-==== The Picasso Triggerfish ====
-[[picasso_triggerfish|]]
-==== The coastal dugong ====
-The coastal dugong (Dugong dugon) is a marine mammal belonging to the order Coastals. The eyelids of Dugong glands are secreting oily fluid, which protects the eyes from the influence of strong salty seawater. After pulling the dugong above the water surface the secretion collects in the corner of the eye in a form of the so-called mermaid's tear, which is sometimes treated by the peoples of Oceania as an amulet. [([[https://www.nationalgeographic.com/animals/mammals/facts/dugong|National Geographics]])]
-==== The American paddlefish ====
+==== Species of marine blowfish ====
-The American paddlefish, polychaete, paddlefish (Polyodon spathula) is a species of freshwater sturgeon fish in the paddlefish family. It is found in the Mississippi River basin and Lake Erie. It was imported to Poland in the 1990s. The snout - a rostrum shaped like a horizontally arranged paddle - is sometimes half the length of the whole body and is a sensory organ. [([[https://www.britannica.com/animal/American-paddlefish|Britannica]])]
+The Picasso triggerfish (Rhinecanthus aculeatus) is a species of marine blowfish. It inhabits coral reefs and is kept in aquariums. [([[https://www.fishlore.com/profiles_picasso_triggerfish.htm|Fish Lore]])]
+==== Sensory organ ====
+The snout — a rostrum shaped like a horizontally arranged paddle — is sometimes half the length of its entire body and functions as a sensory organ.
+[([[https://academic.oup.com/bioscience/article/57/5/399/221708|Oxford Academic]])]
+==== Toothless Garra rufa ====
+The toothless Garra rufa can feed on the exfoliating epidermis of people suffering from certain skin conditions such as psoriasis. [([[https://www.theguardian.com/lifeandstyle/2007/apr/10/healthandwellbeing.health2|The Guardian]])]
+==== Mouth wide open ====
+It characteristically grabs its food, which consists mainly of pelagic crustaceans, swimming with its mouth wide open in a zone devoid of vegetation, filtering out planktonic organisms with long and dense filtering appendages (juveniles initially have teeth that become resorbed over time), staggering in circles and often in eights.
+[([[https://www.fws.gov/fisheries/freshwater-fish-of-america/paddlefish.html|Fish and Aquatic Conservation]])]
+==== Vandellia cirrhosa ====
+The candiru (Vandellia cirrhosa) lives in the rivers of the Amazon and feeds exclusively on the blood of larger fish, entering their gills and biting through their blood vessels. It satisfies its hunger within a minute and swims away in search of new prey, which it finds by the smell of ammonia emitted from its prey's gills as it breathes. [([[https://futurism.com/fact-or-fiction-the-urethra-invading-fish|Futurism]])]
+==== Multicolored arrangement of streaks and spots ====
+The body of the fish has a multicolored arrangement of streaks and spots reminiscent of Pablo Picasso's sketches, hence the usual species epithet. [([[https://www.aquarium.co.za/species/entry/picasso-triggerfish|Aquarium]])]
+==== Spawns ====
+It spawns in early spring in rivers and lakes in turbid water with sandy gravel or rocky bottom. The female lays 80-250 thousand grains of eggs. She then forms large flocks that swim into larger tributaries or lakes. In its habitat, it stays away from the shore at considerable depths.
+[([[https://www.wildlifedepartment.com/fishing/species/paddlefish|Wildlife Department]])]
+==== Up to 30 minutes ====
+Treatment involves submerging the limbs, sometimes even the entire body, in an aquarium with these fish. One treatment usually takes up to 30 minutes and several hundred fish are needed. Opponents of ichthyotherapy draw attention to the risk of waterborne diseases. [([[https://www.peta.org/living/personal-care-fashion/fish-pedicures-dangerous-and-cruel/|PETA]])]
+==== Studies of color vision in fish ====
+Picasso's Triggerfish has been used in studies of color vision in fish. [([[https://www.researchgate.net/publication/236197188_Colour_vision_and_response_bias_in_a_coral_reef_fish|Research Gate]])]
+==== Feed on algae and small organism ====
+In natural conditions, they feed on algae and small organisms living there. In the aquarium, they should be fed with plant food such as spirulina tablets, cucumber, melon, spinach, or zucchini supplemented with frozen and live animal food such as chironomid, tubeworm, or artemia (chopped earthworm).
+[([[https://www.fws.gov/fisheries/ANS/erss/uncertainrisk/ERSS-Garra-rufa_Final.pdf|US Fish and Wildlife Service]])]
+==== Candiru enters the urinary tract ====
+There are cases when candiru enters the urinary tract of large mammals, including humans who urinate in the water. Heading upstream of the flowing urine, the fish enters the urethra and falls into a trap from which it is impossible to escape because of the sharp spines. The fish dies but can only be removed surgically.
+[([[https://www.wemjournal.org/article/S0953-9859%2891%2971299-0/pdf|WEM Journal]])]
+==== Mermaid's tear ====
+The coastal dugong (Dugong dugon) is a marine mammal belonging to the order Coastals. The eyelids of dugongs contain glands that secrete an oily fluid that protects their eyes from being damaged by the salty seawater. After pulling the dugong above the water's surface, this secretion collects in the corner of the eye and forms what is commonly called a "mermaid's tear". These are used by some peoples of Oceania as an amulet. [([[https://www.nationalgeographic.com/animals/mammals/facts/dugong|National Geographics]])]
+==== Aggressive ====
+For too long "peeping" Picasso can "chase" the diver, nibbling or biting him with quite big teeth (8 at the top and bottom). This attack is not dangerous but can be a real surprise for the unsuspecting diver. [([[https://www.saltwateraquariumblog.com/picasso-triggerfish/|Saltwater Aquarium Blog]])]
+==== Sea cows ====
+Commonly known as "sea cows", dugongs graze peacefully on seagrasses in the shallow coastal waters of the Indian Ocean and western Pacific. [([[https://oceana.org/marine-life/marine-mammals/dugong|Oceana]])]
+==== Movement ====
+Note that these fish can move vertically or hover like a helicopter.
+[([[https://www.seattleaquarium.org/animals/triggerfish|Seattle Aquarium]])]
+==== Cousins to manatees ====
+Dugongs are cousins to manatees and have a similar plump appearance, but have a tail similar to dolphins'.
+[([[https://swimmingwiththemanatees.com/are-dugongs-and-manatees-related/|Swimming With The Manatees]])]
+==== Illegal harvesting ====
+Because paddlefish is considered to be an ancient species, it is illegal to harvest for caviar. Harvesting paddlefish is considered poaching.
+[([[https://mdc.mo.gov/newsroom/mdc-federal-agents-snag-major-paddlefish-poaching-operation|Missouri Department of Conservation]])]
+{{tag>biology fauna nature}}

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