Regarding a General and overall learning book on the creatures of
the sea - I propose the out of print, but many used books of :

Marine Life  An Illustrated Encyclopedia of Invertebrates in the Sea.
David and Jennifer George
(Principal Scientific Officer in the Zoology Dept. British Museum)
Jennifer is a Principal Lecturer in Life Sciences at the Polytechnic
    of Central London.

A Wiley-Interscience book.

I bought mine while land-locked and enjoyed the 128 pages of color
plates.  This  past year, I used it in helping sort out star fish
[ Echinodermata ] and it shows most in live undersea modes.
Some 27 Phylum are considered within.


http://www.amazon.com/gp/offer-listing/0471056758/

This is the US amazon - there are other like sites worldwide.
If in the UK, your source would be at the UK amazon or like site.
It was printed in 7 countries on a world wide basis.

Martin

--
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/

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