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.
● Over 115 species described in detail with in situ photographs
to help with underwater recognition
● Information on size, depth, habitat and distribution
● Key distinguishing features and areas of confusion in identification
highlighted
● Details of body structure, life histories, digestive and reproductive
processes
● Information about predators, interactions between species,
non-native and problem invasive species
