free-swimming stalkless crinoid with ten feathery arms; found on muddy sea bottoms.
自由飘浮的无柄,有十只羽状的手臂;多见于多泥的底。
free-swimming stalkless crinoid with ten feathery arms; found on muddy sea bottoms.
自由飘浮的无柄,有十只羽状的手臂;多见于多泥的底。
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