Abstract:
The aim of this study is to observe and identify the diversity of the nudibranch, to
observe the distribution and habitat preferences of the nudibranchs and also to
estimate the species abundance in Redang Island. The sampling was divided into two
methods; the 0.18m2 photoquadrat analysis by Coral Point Count with Excel
extension (CPCe) and survey (questionaire) survey that is distributed to dive centres
in Redang Island. The species diversity and distribution are analyzed using the
ecological indices which are Shannon-Weiner Index and Pielou Evenness Index. The
habitat preferences is analyzed using One Way ANOVA and Post Hoc Tukey test
(P<0.05). Overall, there are 21 species of nudibranchs from IO genus and seven
families of nudibranchs found from 24 dive sites in Redang Island. The most
dominant families found are family Chromodorididae and Phyllidiidae with a total of
seven and six species respectively. The species that are most abundant is Phyllidiella
pustulosa from family Phyllidiidae and Chromodoris bullocki from family
Chromodorididae. In terms of diversity, Terumbu Kili and Tunnel point are highest in
number of different species. Pulau Kerengga and Mak Cantik on the other hand house
the most nudibranchs in general. The habitat preference for nudibranchs in Redang
Island is mostly coralline algae and macroalgae
