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KALAI

AQUATIC WORLD

RAMESH122
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KALAI

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  1. What is Aquatic Animals? • Aquatic animals are diverse organisms that live in water, from freshwater lakes to vast oceans, and possess special adaptations for their environments, such as gills for breathing and fins for movement. • They are crucial to Earth's ecosystems, playing vital roles in food webs, nutrient cycles, and even climate regulation.

  2. Major Aquatic Habitats • Freshwater habitats Description: These are bodies of water with low salinity Examples: Ponds, lakes, rivers, and streams. Animals: Fish like catfish, and aquatic insects live here. 2) Marine (saltwater) habitats Description: These are large bodies of water with high salt content Examples: Oceans, seas, coral reefs, and mangrove swamps Animals: A wide variety of life lives in the ocean, from the surface to the deep sea like whales, tuna and goldfish.

  3. Major Aquatic Habitats • Surface/Open ocean: Dolphins, sharks, and sea turtles. • Deep sea: Squids and octopuses. • Coastal: Crabs, seals, sea lions and various fish.

  4. Adaptations for aquatic life • Breathing, • Movement, • Protection Breathing: Most aquatic animals possess gills to take in dissolved oxygen from the water. Mammals like dolphins and whales, however, have lungs and must go to the surface to breathe air.

  5. Adaptations for aquatic life Movement: Many aquatic animals have streamlined bodies that reduce water resistance (drag), allowing them to swim efficiently. They use fins, flippers, or tails for propulsion and balance. Protection: Some, like fish, have bodies covered in scales for protection. Parrotfish create a mucus layer to protect themselves from parasites while sleeping.

  6. Types of Aquatic Animals • Fish: Cold-blooded vertebrates with gills and fins (e.g., tuna, sharks). • Mammals: Warm-blooded animals that give birth to live young (e.g., dolphins, whales, seals). • Molluscs: Soft-bodied animals like octopuses and squids. • Crustaceans: Decapod animals such as crabs, lobsters, and shrimp.

  7. Role of Aquatic Animals in the Ecosystem • Predators & Prey: Regulate populations, preventing overgrowth of any single species. • Scavengers & Decomposers: Clean the environment by breaking down dead matter. • Filter Feeders: Improve water quality by filtering out particles and excess nutrients. • Habitat Builders: Coral reefs and oyster beds create natural shelters for many aquatic species.

  8. Uses and Applications of Aquatic Animals Aquatic animals support humans in many ways: • Food Source: Fish and shellfish provide protein for billions of people. • Medicine: Marine invertebrates are studied for new drugs and antibiotics. • Agriculture: Aquatic animals are used in aquaculture to increase food production. • Environmental monitoring: Some species indicate water quality and ecosystem health.

  9. List of 5 Aquatic Animals with Quick Facts • Blue Whale: Largest animal on Earth. Its tongue can weigh as much as an elephant. • Parrotfish: Contributes to sand formation by excreting ground-up coral. • Seahorse: Males give birth—rare in the animal kingdom. • Crab: Taste sensors located on their feet. • Jellyfish: Has no heart, brain, or bones yet can move and catch prey.

  10. Interesting Facts about Aquatic Animals • Dolphins sleep with only one-half of their brain at a time to stay alert for predators. • Angelfish pair with a single mate for life—if one dies, the other never breeds again. • Some shrimp act as “cleaners,” removing parasites from fish and protecting coral reefs.

  11. Threats to aquatic life • Pollution: Contamination from sources like oil spills and chemical runoff is a major threat to aquatic ecosystems. • Overfishing: Human activities like overfishing are causing the decline of many aquatic animal populations. • Climate change: Changes in water temperature and ocean acidification due to climate change are putting pressure on aquatic species.

  12. Protect of Aquatic animals • Reduce waste: Minimize single-use plastics and participate in beach and neighbourhood clean-ups to prevent litter from entering waterways. • Conserve water and energy: Reducing water usage means less wastewater enters the ocean, and saving energy helps combat global warming which is harmful to marine ecosystems. • Be a responsible traveller: Avoid disturbing marine life, maintain a safe distance from wild animals, clean up after yourself, and support eco-tourism that benefits local communities.

  13. Protect of Aquatic animals • Reduce pollution: Enforce policies to ban harmful plastics, improve waste management systems, and implement pollution reduction strategies • Increase ocean literacy: Educate the public about the importance of marine ecosystems, the threats they face, and how to take positive action

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