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Slate Pencil Urchin Heterocentrotus mamillatus
2012-04-10 19:06:48

Slate Pencil Urchin (Heterocentrotus mamillatus), also known as Red Slate Pencil Urchin or Red Pencil Urchin, is a species of sea urchin found in the tropical waters of the Indian and Pacific oceans. It is most abundant off the coast of Hawaii. Specimens found off the coast of Hawaii have bright red spines, more so than others found elsewhere, which generally have yellowish or brown spines....

Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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