🐟 The Fascinating World of Fish: Nature’s Underwater Marvels When we think of fish, many of us picture a goldfish in a bowl or a tasty seafood dish. But the world of fish is vast, colorful, and deeply intertwined with the health of our planet. From vibrant coral reef dwellers to deep-sea giants, fish play a crucial role in ecosystems, cultures, and economies across the globe. 🌊 What Makes Fish Unique? Fish are cold-blooded aquatic animals that breathe through gills and typically have scales covering their bodies. There are over 34,000 known species, making fish the most diverse group of vertebrates on Earth. Fish are usually divided into three main groups: Bony fish (Osteichthyes) – like salmon, tuna, and clownfish. Cartilaginous fish (Chondrichthyes) – such as sharks, rays, and skates. Jawless fish (Agnatha) – like lampreys and hagfish. 🌍 Why Fish Matter 1. Ecological Role: Fish maintain the balance of aquatic ecosystems by controlling algae, feeding on smaller organisms, and ...