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Sea squirts and sponges are found in most seafloor habitats around
the coasts of Britain and Ireland. Despite being the dominant life
forms in many areas, these two groups of under-recorded marine
animals are often confused with one another, and most divers and
snorkellers can recognise and name very few species. In fact,
around 500 species of Ascidiacea (sea squirts) and Porifera
(sponges) have been described so far in British and Irish seas,
corresponding to over 4% of the world's total. This book is
recommended reading for anyone who wants to identify and discover
more about these fascinating and diverse animals. Rather than
relying on the characteristics of preserved specimens, this guide
uses marine photography and detailed underwater observations to
concentrate on in situ features, allowing you to record species
without collecting them. Most sea squirts found in Britain and
Ireland's shallow waters are included, together with the most
easily recognised sponges. Whether you are a student, a diver, a
rockpooler or simply an enthusiast, this is an essential companion.
aAA AA Over 115 species described in detail, with in situ
photographs to help with underwater recognition aAA AA Information
on size, depth, habitat and distribution aAA AA Key distinguishing
features and areas of confusion in identification highlighted aAA
AA Details of body structure, life histories, digestive and
reproductive processes aAA AA Information about predators,
interactions between species, non-native and problem invasive
species
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