{"id":89466,"date":"2025-06-01T10:05:11","date_gmt":"2025-06-01T10:05:11","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89466"},"modified":"2025-06-01T10:05:11","modified_gmt":"2025-06-01T10:05:11","slug":"if-a-healthy-freshwater-fish-is-placed-in-saltwater-the-fish","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/if-a-healthy-freshwater-fish-is-placed-in-saltwater-the-fish\/","title":{"rendered":"If a healthy freshwater fish is placed in saltwater, the fish"},"content":{"rendered":"

If a healthy freshwater fish is placed in saltwater, the fish<\/p>\n

[amp_mcq option1=”becomes dehydrated and dies” option2=”becomes bloated and dies” option3=”suffers from microbial infection and dies” option4=”experiences no problem” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2011<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nFreshwater fish live in a hypotonic environment, meaning the concentration of solutes in the surrounding water is lower than in their body fluids. Water constantly enters their body by osmosis, and salts are lost. Freshwater fish deal with this by drinking very little water, actively absorbing salts through their gills, and excreting large amounts of dilute urine.
\nWhen a healthy freshwater fish is placed in saltwater, it moves into a hypertonic environment, where the solute concentration outside is much higher than inside its body. This causes water to move *out* of the fish’s body into the surrounding saltwater by osmosis. This leads to rapid dehydration of the fish’s tissues and organs. The fish cannot osmoregulate effectively in this environment and will become dehydrated and eventually die.
\n<\/section>\n
\nOsmosis causes water to move from an area of lower solute concentration to an area of higher solute concentration. Freshwater fish are adapted to prevent water intake and conserve salts; saltwater fish are adapted to conserve water and excrete excess salts. Moving a fish from its native environment to one with significantly different salinity disrupts its osmoregulatory balance.
\n<\/section>\n
\nMarine fish, in contrast, live in a hypertonic environment. They tend to lose water and gain salts. They deal with this by drinking large amounts of saltwater, actively excreting excess salts through their gills and kidneys, and producing small amounts of concentrated urine. Euryhaline fish, such as salmon, are adapted to survive in both freshwater and saltwater environments by changing their osmoregulatory mechanisms.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

If a healthy freshwater fish is placed in saltwater, the fish [amp_mcq option1=”becomes dehydrated and dies” option2=”becomes bloated and dies” option3=”suffers from microbial infection and dies” option4=”experiences no problem” correct=”option1″] This question was previously asked in UPSC CAPF – 2011 Download PDFAttempt Online Freshwater fish live in a hypotonic environment, meaning the concentration of solutes … <\/p>\n

Detailed SolutionIf a healthy freshwater fish is placed in saltwater, the fish<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1085],"tags":[1465,1117,1237],"class_list":["post-89466","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1465","tag-biology","tag-human-anatomy-and-physiology","no-featured-image-padding"],"yoast_head":"\nIf a healthy freshwater fish is placed in saltwater, the fish<\/title>\n<meta name=\"description\" content=\"Freshwater fish live in a hypotonic environment, meaning the concentration of solutes in the surrounding water is lower than in their body fluids. Water constantly enters their body by osmosis, and salts are lost. Freshwater fish deal with this by drinking very little water, actively absorbing salts through their gills, and excreting large amounts of dilute urine. When a healthy freshwater fish is placed in saltwater, it moves into a hypertonic environment, where the solute concentration outside is much higher than inside its body. This causes water to move *out* of the fish's body into the surrounding saltwater by osmosis. This leads to rapid dehydration of the fish's tissues and organs. The fish cannot osmoregulate effectively in this environment and will become dehydrated and eventually die. Osmosis causes water to move from an area of lower solute concentration to an area of higher solute concentration. Freshwater fish are adapted to prevent water intake and conserve salts; saltwater fish are adapted to conserve water and excrete excess salts. Moving a fish from its native environment to one with significantly different salinity disrupts its osmoregulatory balance.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/if-a-healthy-freshwater-fish-is-placed-in-saltwater-the-fish\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"If a healthy freshwater fish is placed in saltwater, the fish\" \/>\n<meta property=\"og:description\" content=\"Freshwater fish live in a hypotonic environment, meaning the concentration of solutes in the surrounding water is lower than in their body fluids. Water constantly enters their body by osmosis, and salts are lost. Freshwater fish deal with this by drinking very little water, actively absorbing salts through their gills, and excreting large amounts of dilute urine. When a healthy freshwater fish is placed in saltwater, it moves into a hypertonic environment, where the solute concentration outside is much higher than inside its body. This causes water to move *out* of the fish's body into the surrounding saltwater by osmosis. This leads to rapid dehydration of the fish's tissues and organs. The fish cannot osmoregulate effectively in this environment and will become dehydrated and eventually die. Osmosis causes water to move from an area of lower solute concentration to an area of higher solute concentration. Freshwater fish are adapted to prevent water intake and conserve salts; saltwater fish are adapted to conserve water and excrete excess salts. Moving a fish from its native environment to one with significantly different salinity disrupts its osmoregulatory balance.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/if-a-healthy-freshwater-fish-is-placed-in-saltwater-the-fish\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:05:11+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"If a healthy freshwater fish is placed in saltwater, the fish","description":"Freshwater fish live in a hypotonic environment, meaning the concentration of solutes in the surrounding water is lower than in their body fluids. Water constantly enters their body by osmosis, and salts are lost. Freshwater fish deal with this by drinking very little water, actively absorbing salts through their gills, and excreting large amounts of dilute urine. When a healthy freshwater fish is placed in saltwater, it moves into a hypertonic environment, where the solute concentration outside is much higher than inside its body. This causes water to move *out* of the fish's body into the surrounding saltwater by osmosis. This leads to rapid dehydration of the fish's tissues and organs. The fish cannot osmoregulate effectively in this environment and will become dehydrated and eventually die. Osmosis causes water to move from an area of lower solute concentration to an area of higher solute concentration. Freshwater fish are adapted to prevent water intake and conserve salts; saltwater fish are adapted to conserve water and excrete excess salts. Moving a fish from its native environment to one with significantly different salinity disrupts its osmoregulatory balance.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/if-a-healthy-freshwater-fish-is-placed-in-saltwater-the-fish\/","og_locale":"en_US","og_type":"article","og_title":"If a healthy freshwater fish is placed in saltwater, the fish","og_description":"Freshwater fish live in a hypotonic environment, meaning the concentration of solutes in the surrounding water is lower than in their body fluids. Water constantly enters their body by osmosis, and salts are lost. Freshwater fish deal with this by drinking very little water, actively absorbing salts through their gills, and excreting large amounts of dilute urine. When a healthy freshwater fish is placed in saltwater, it moves into a hypertonic environment, where the solute concentration outside is much higher than inside its body. This causes water to move *out* of the fish's body into the surrounding saltwater by osmosis. This leads to rapid dehydration of the fish's tissues and organs. The fish cannot osmoregulate effectively in this environment and will become dehydrated and eventually die. Osmosis causes water to move from an area of lower solute concentration to an area of higher solute concentration. Freshwater fish are adapted to prevent water intake and conserve salts; saltwater fish are adapted to conserve water and excrete excess salts. Moving a fish from its native environment to one with significantly different salinity disrupts its osmoregulatory balance.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/if-a-healthy-freshwater-fish-is-placed-in-saltwater-the-fish\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:05:11+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/if-a-healthy-freshwater-fish-is-placed-in-saltwater-the-fish\/","url":"https:\/\/exam.pscnotes.com\/mcq\/if-a-healthy-freshwater-fish-is-placed-in-saltwater-the-fish\/","name":"If a healthy freshwater fish is placed in saltwater, the fish","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:05:11+00:00","dateModified":"2025-06-01T10:05:11+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Freshwater fish live in a hypotonic environment, meaning the concentration of solutes in the surrounding water is lower than in their body fluids. Water constantly enters their body by osmosis, and salts are lost. Freshwater fish deal with this by drinking very little water, actively absorbing salts through their gills, and excreting large amounts of dilute urine. When a healthy freshwater fish is placed in saltwater, it moves into a hypertonic environment, where the solute concentration outside is much higher than inside its body. This causes water to move *out* of the fish's body into the surrounding saltwater by osmosis. This leads to rapid dehydration of the fish's tissues and organs. The fish cannot osmoregulate effectively in this environment and will become dehydrated and eventually die. Osmosis causes water to move from an area of lower solute concentration to an area of higher solute concentration. Freshwater fish are adapted to prevent water intake and conserve salts; saltwater fish are adapted to conserve water and excrete excess salts. 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