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16 Απρ 2024 · Characterized by vibrant hues, differing spike lengths, and even flattened shapes, this diversified group of marine animals offers much to explore. Read on to learn more about these echinoderms and how to identify the different types of sea urchins.
6 Δεκ 2019 · English Channel sea urchins can be considered as one of the most beautiful sea creatures. These attractive and colorful organisms can make everyone fall in love with them within a few seconds. English Channel sea urchins are amongst the rarest species of the family and therefore are of great value.
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The most easily recognisable sea urchins are round, often brightly coloured and covered in sharp-looking spines. In fact, ‘urchin’ comes from an old word for hedgehog owing to their similar-looking spiky armour. However, there are more than 1,000 species of sea urchin, with varying characteristics.
Sea urchins are found in every ocean and in every climate, from the tropics to the polar regions, and inhabit marine benthic (sea bed) habitats, from rocky shores to hadal zone depths. The fossil record of the Echinoids dates from the Ordovician period, some 450 million years ago.
12 Νοε 2009 · See photos of sea urchins (including fire urchins, pencil-spined urchins, and more) in this oceans life photo gallery from National Geographic.
