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.

URCHIN翻译：（尤指肮脏淘气的）小孩。 了解更多。

Sea urchin, any of about 950 living species of spiny marine invertebrate animals (class Echinoidea, phylum Echinodermata) with a globular body and a radial arrangement of organs, shown by five bands of pores running from mouth to anus over the test (internal skeleton).

The meaning of URCHIN is hedgehog. How to use urchin in a sentence.

Sea urchins are globe-shaped creatures that live on the ocean floor. Many beachgoers have had the misfortune to feel a sting from their spines, but how much do you know about the lives of these animals?

urchin， 英语单词，主要用作 名词。 作名词时译为“顽童，淘气鬼；海胆；刺猬”等 [1]。 n. 顽童，淘气鬼；海胆；刺猬. They say he is a mischief-maker, a tramp, a street urchin—Calumnies! 他们说他是个捣蛋鬼，是个流浪汉，是个街头顽童——诋毁！ The spines of a fire urchin form a multicolored flower off Komodo Island, Indonesia. 火海胆的刺在印度尼西亚科莫多岛附近形成了五颜六色的花朵。

Sea urchins are typically viewed as spiky, black, spherical creatures. However, many may be surprised to discover this animal group's immense variety. Characterized by vibrant hues, differing spike lengths, and even flattened shapes, this diversified group of …

2025年1月11日 · Sea urchins, or simply urchins, are globular echinoderms of the phylum Echinodermata (consisting of starfish, sea cucumbers, sand dollars, brittle stars, and crinoids), forming the class Echinoidea. These animals begin their life as bilaterally symmetrical larvae but develop into adults with pentamerous or five-fold symmetry.

URCHIN definition: 1. a small child, especially one who behaves badly and is dirty or untidily dressed: 2. a small…. Learn more.

必应词典为您提供urchin的释义，美[ˈɜrtʃɪn]，英[ˈɜː(r)tʃɪn]，n. 贫穷肮脏的儿童；流浪儿； 网络释义： 海胆；顽童；淘气鬼；