800,000 liters (211,337 gallons) 🐟🐟🐟 One of the largest freshwater aquariums in Europe at the Aquatis Aquarium-Vivarium Lausanne 🇨🇭 The American paddlefish (Polyodon spathula), is a remarkable living fossil that has existed for more than 120 million years. Their elongated, paddle-shaped rostrum is covered with thousands of electroreceptors, allowing them to detect the weak electric fields of plankton and navigate murky waters with precision. ⚡🌊 These giants can grow over 2 meters long and