Saltwater fish drink seawater for hydration. They eliminate excess salt using special cells in their gills and kidneys. Their gills absorb sodium and chloride efficiently. Unlike freshwater fish, saltwater fish adapt to remove salt while keeping necessary nutrients and managing moisture effectively. Moreover, fish utilize various survival strategies. They produce small amounts of concentrated urine … Read more

Fish move between lakes mainly through rivers that connect them. They migrate along these waterways, using currents and their senses to navigate. Headwater capture can create new routes. However, barriers like dams block their paths, impacting their lifecycles and access to spawning areas. Isolated water bodies can connect through several means. Natural channels, such as … Read more

Fish live under ice by using adaptations like being cold-blooded. This lets their body temperature match the cold water, slowing their metabolism. Species like the golden carp survive freezing by resting in deeper waters. They reduce activity levels and conserve energy until warmer temperatures return, aiding respiration and digestion. Fish also rely on various feeding … Read more

Deep-sea fish live in harsh conditions by adapting to high pressure and low oxygen. They lack gas-filled swim bladders, using specialized body structures instead. TMAO, a chemical in their cells, protects them from pressure effects. Their survival strategies include unique food sources and efficient body design to thrive in the deep sea. Additionally, deep sea … Read more

Saltwater fish live in a saline environment. They drink seawater to stay hydrated. To manage excess salt, they use specialized cells in their gills and kidneys for salt excretion. This evolutionary adaptation helps them survive in high salt conditions. Unlike freshwater fish, they often lose water and need to drink seawater. Saltwater fish also have … Read more

Fish live in frozen lakes by slowing their metabolism and entering torpor. This helps them reduce energy use. When the surface freezes, fish move to deeper water where oxygen levels are higher. Coldwater fish species, such as trout, can survive for long periods without food by conserving energy during winter. Many species, such as trout … Read more

Deep-sea fish live at the ocean’s bottom by having flexible cell membranes rich in unsaturated fatty acids. They do not have swim bladders, which helps reduce compression from high pressure. Their adaptations include special eyesight for darkness and echolocation. Many species are mostly water, enhancing their survival mechanisms. Additionally, some deep-sea fish possess unique enzymes … Read more

Fish increase lake carbon dioxide levels through respiration, as they release CO₂. Fish waste and organic matter also decompose, adding to carbon cycling. This increase in CO₂ can lower oxygen levels in the water, which may suffocate fish and disrupt the overall aquatic environment. Increased carbon dioxide levels can impact aquatic life significantly. Elevated carbon … Read more

Fish move from freshwater to seawater via osmosis. Anadromous fish, such as salmon, hatch in freshwater and migrate to the ocean. They ingest seawater to avoid dehydration, using gills and kidneys to remove excess salt. This regulation helps them adapt to different salt levels and maintain hydration during their journey. When transitioning from freshwater to … Read more

Fish get worms by eating infected prey, such as smaller fish or marine mammals. Parasites like anisakid nematodes enter fish when they consume infected hosts. Symptoms of infection include sores on the skin. Environmental stress factors can also make fish more likely to get worms. Health risks for humans arise when consuming infected fish. Some … Read more