Freshwater fishes absorb water through their gills and mouths. They produce a lot of urine and lose salt. They regain salt using special cells in their gills. Marine fishes, on the other hand, lose water in seawater. They drink seawater and excrete the extra salt through their gills while conserving water. In contrast, marine fishes … Read more

Freshwater fish take in ions using specialized cells called ionocytes. These cells are found in the gills and skin. They actively absorb key ions, including sodium (Na+), chloride (Cl−), and calcium (Ca2+). This process helps replace ions lost through diffusion into their surrounding environment. To counteract the excessive water intake, freshwater fish actively transport ions … Read more

Freshwater fish stay hydrated through osmosis. They inhabit water with low salinity, which allows water to enter their bodies through their skin and gills. This process balances the salt in their cells. To avoid too much water, they release excess fluid as urine. This keeps their body fluids at the right level. Freshwater fish do … Read more

Freshwater fish react differently to boat noise. A study in the Detroit River found that Cyprinidae fish avoided boat sounds due to their specialized auditory structures. In contrast, Gobiidae, Centrarchidae, and Percidae fish did not show the same avoidance behavior, indicating they have different sensitivities to noise. The use of sound to communicate among fish … Read more

Freshwater fish meet their water demands by absorbing water through their skin and gills. Their cells contain higher salt concentrations than the surrounding water. This process, known as osmosis, helps maintain osmotic balance. Unlike saltwater fish, freshwater fish do not need to drink water actively. Additionally, many species have developed behavioral strategies. For instance, some … Read more

Freshwater fish maintain osmolarity through osmoregulation. They absorb water mainly through their gills and mouth. This excess water results in high urine production, leading to salt loss. Mitochondria-rich cells in the gills help retain essential salts. This process ensures balance in their body fluids despite changing external salinity. Freshwater fish predominantly absorb water through their … Read more

Freshwater fish get gill flukes when new fish are added to the aquarium without quarantine. The parasites can also cling to plants or live in the substrate. These areas allow flukes to wait for a healthy fish as a host. Quarantine new additions to prevent infestations and protect your fish from these harmful parasites. To … Read more

Freshwater fish excrete nitrogenous waste mainly as ammonia. They use their gills to efficiently diffuse ammonia into the water. This method allows for rapid waste removal. A small amount of nitrogenous waste also exits through the kidneys, which supports their overall efficiency in the aquatic environment. Gills play a vital role in this process. Fish … Read more

Freshwater fish manage osmosis by absorbing water and producing diluted urine. They drink less to control water intake. In contrast, marine fish live in a hypertonic environment, so they drink seawater and excrete salt to stay balanced. These adaptations help both types of fish maintain proper cell function in different water conditions. Conversely, marine fish … Read more

Freshwater fish handle osmosis by absorbing water through their skin and gills. They drink very little and produce dilute urine. In contrast, marine fish live in a hypertonic environment, which causes water loss. To cope, they drink seawater and excrete excess salt using special cells, helping them regulate their internal water levels. In contrast, marine … Read more