Fish live in frozen lakes by staying in deeper water. The ice on top insulates the water below. As cold-blooded animals, fish adapt to the lower temperatures. Their metabolism slows down, helping them survive longer without food while oxygen stays trapped under the ice. This allows them to rest through winter and maintain fish survival. … Read more

Deep-sea fish survive in the ocean’s depths by balancing internal pressure with external pressure. They use trimethylamine N-oxide (TMAO) to stabilize cells under high pressure. These fish thrive in low-oxygen environments and have adaptations like unsaturated fatty acids to help them find food and endure extreme conditions. Fish at the bottom of the ocean utilize … Read more

Fish raise carbon dioxide levels in lakes through respiration and the decomposition of organic matter. Freshwater fish, like goldfish, can produce 70-170 mg of CO₂ each day. This rise in CO₂ levels can lower pH levels, which impacts aquatic ecosystems, including fish respiration and oxygen availability. The constant cycling of carbon dioxide impacts freshwater ecosystems … Read more

Salmon are anadromous fish. They hatch in freshwater and then migrate to seawater. This transition involves osmosis. In saltwater, they take in water and remove excess salts through their gills and kidneys. Hormones help regulate these changes, allowing salmon to adapt to different salt levels throughout their life. When fish move to seawater, they face … Read more

Fish get worms by eating infected intermediate hosts, like crustaceans or smaller fish. Common parasites are nematodes and flatworms. When infected fish are eaten, larvae hatch in the stomach. Warmer waters can lead to more parasites in fish. Cooking fish thoroughly can kill these parasites and prevent infections. Another common parasite is the tapeworm, which … Read more

Fish reach Lake Eyre through inland rivers that flood, transporting viable fish eggs and adult fish. These native species, adapted to high salinity, breed in temporary water bodies when conditions are right. Flooding prompts them to migrate south to the lake, forming an oasis that attracts migratory birds and supports the ecosystem. Fish such as … Read more

Fish get stuck in ice when they die, causing their bodies to float and freeze. Ice creates an insulating layer on the surface of the lake. Fish can survive beneath this ice, as liquid water and oxygen are available. Cold temperatures lower their metabolism, allowing them to remain inactive until spring. Fish adapt to frozen … Read more

Fish get oxygen under ice through their gills by extracting dissolved oxygen from the water. In winter, fish slow their metabolism to save energy. Underwater plants also produce some oxygen through photosynthesis, even with limited light. Denser, deeper water holds more oxygen, supporting fish during the cold months. Additionally, as microbial activity occurs in the … Read more

Fish get oxygen from water through their gills. In a frozen lake, they rely on dissolved oxygen that stays in the water. Algae and underwater plants produce oxygen through photosynthesis, helping fish breathe. Although ice restricts oxygen exchange, fish can survive until spring when the ice thaws. As lakes freeze, the water beneath the ice … Read more

Fish get into lakes and ponds mainly through natural movement and animal carriers like waterbirds. These birds can transport fish eggs. Rivers also connect lakes and ponds, allowing fish to migrate. Human activity, such as stocking fish, and heavy rainfall can further help fish enter isolated areas. Human activities also play a significant role. People … Read more