
Fucoxanthin is a xanthophyll, with formula C42H58O6. It is found as an accessory pigment in the chloroplasts of brown algae and most other heterokonts, giving them a brown or olive-green color. Fucoxanthin absorbs light primarily in the blue-green to yellow-green part of the visible spectrum, peaking at around 510-525 nm by various estimates and a...
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http://en.wikipedia.org/wiki/Fucoxanthin

<chemical> Carotenoid pigment of certain brown algae (Phaeophyta) and bacteria: absorbs at 500-580 nm. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973

Carotenoid pigment of certain brown algae (Phaeophyta) and bacteria: absorbs at 500-580nm.
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http://www.encyclo.co.uk/visitor-contributions.php

yellowish-brown pigment found in some members of the Chromista, including kelps and diatoms.
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http://www.ucmp.berkeley.edu/glossary/glossary_3.html
No exact match found.