Whether a fish must live in a river (freshwater) or the ocean (saltwater) is strictly determined by its biology. A fish's body is adapted to a specific salt concentration, and moving them between environments causes fatal dehydration or cell rupture. A breakdown of where fish live and how they are classified:

Whether a fish must live in a river (freshwater) or the ocean (saltwater) is strictly determined by its biology. A fish's body is adapted to a specific salt concentration, and moving them between environments causes fatal dehydration or cell rupture. 
A breakdown of where fish live and how they are classified:
Freshwater Fish (Rivers, Lakes, & Streams)
Habitat: -
These fish live in environments with very low salt concentrations (like the Vishvamitri River in Vadodara).
Biology: -
Their bodies have a higher salt concentration than the surrounding water. Through a process called osmosis, water constantly floods into their cells. They have adapted to rarely drink water and constantly urinate to get rid of excess fluid.
Examples: Carp, trout, catfish, and tilapia. 
 Saltwater Fish (Oceans & Seas)
Habitat: -
These fish thrive in highly saline environments.
Biology: -
Because the ocean is saltier than their bodily fluids, saltwater fish are constantly losing water to the sea. To survive, they must constantly drink saltwater and use their kidneys and gills to filter out the excess salt.
Examples:-
 Tuna, clownfish, cod, and sharks.
 Diadromous Fish (Both)
Habitat: -
A small percentage of fish (about 1%) can survive in both environments during different stages of their lives. They migrate between fresh and saltwater through estuaries (where rivers meet the sea).
Biology: -
These fish have specialized organs that can reverse how they process salt depending on the water they are swimming in.
Examples: -
Salmon (spawn in rivers, mature in the ocean) and eels (live in rivers, spawn in the ocean). 
Specific fish species found in Gujarat or Indian freshwater systems.
How brackish water or estuarine environments work.
The impact of river pollution on local fish habitats. 

MJF Lion ER YK Sharma 

Comments

Post a Comment

Popular posts from this blog

Hydrogen at home — It's the end of solar and wind power

  Hydrogen at home — It's the end of solar and wind power         Statement "1000 pounds" per day of hydrogen at home — It's the end of solar and wind power in the world" is not accurate.     While hydrogen can be produced from renewable energy sources like solar and wind power, it's not a replacement for those sources themselves. Hydrogen production via electrolysis, using renewable electricity, is a promising avenue for decarbonization, but it doesn't negate the need for solar and wind power as direct energy sources.  Cause behind its is as under. Hydrogen as an Energy Carrier:-     Hydrogen is an energy carrier, meaning it stores energy produced elsewhere (like from solar or wind) and can be used to power fuel cells or for other applications.  Electrolysis:-     A key method of producing "green" hydrogen involves using electricity from renewable sources (like solar and wind) to split water into hydrogen and oxygen throu...
Read more

Solar Generation in Night hrs

How to get get Solar generations in Night        While standard solar panels cannot generate electricity at night,     New technologies are being developed to address this limitation.      These advancements focus on harnessing the earth's heat or using infrared radiation emitted by the Earth to generate power, potentially creating 24-hour renewable energy sources.  Key Concepts and Technologies :- 1) Anti-Solar Panels (Thermo-radiative Cells):- How they work:-    These panels, also known as thermoradiative cells, work in reverse of traditional solar panels. Instead of absorbing sunlight, they emit infrared radiation into space, which is then converted into electricity.    Nighttime energy:-     They can generate electricity from the difference in temperature between the panel and the surrounding environment, essentially converting the heat escaping into space back into usable power.  Potential:-  ...
Read more

State-wise carbon emissions in India show a concentration in western and southern states, with byd as major emitters, particularly from the manufacturing and energy sectors. The highest total CO2 emissions have been linked to states like Maharashtra, Andhra Pradesh, Uttar Pradesh, Gujarat, Tamil Nadu, and West Bengal, though the specific ranking can vary depending on the data year and the specific pollutants included.

Image
Top 10 Electricity-Producing States in India (2025) Share of India’s  Total Power Generation in (%) 1) Gujarat ~12.61% 2) Maharashtra~10.71% 3)Rajasthan~10.29% 4)Tamil Nadu~7.63% 5)Karnataka~6.30% 6)Uttar Pradesh~5.88% 7)Andhra Pradesh~5.25% 8)Madhya Pradesh~4.62% 9)Telangana~3.78% 10)Haryana~2.94%      State-wise carbon emissions in India show a concentration in western and southern states, with  by d as major emitters, particularly from the manufacturing and energy sectors. The highest total CO2 emissions have been linked to states like Maharashtra, Andhra Pradesh, Uttar Pradesh, Gujarat, Tamil Nadu, and West Bengal, though the specific ranking can vary depending on the data year and the specific pollutants included.   Key Trends & States Western & Southern Dominance:  - Studies indicate that western states and some southern states are consistently among the highest emitters of CO2.  Manufacturing Powerhouses:  - States with si...
Read more