But there are not only nudibranches to see. 
Depending on the chosen dive spot there is a lot of different sea life to watch. 
On some spots there are massive hard- and soft corals or huge sea fans, on other spots it's more the quantity of reef fish that make that spots special.

Hard coral at Malu Malu

 

At "Froggie Fort" we found more than 30 stingrays during the first 15 minutes of one dive - then we stopped counting...
Below: Im pretty proud that I found this very nice stone fish resting on top of a coral. I probably had not seen it if it had not moved just a little bit while I was swimming by...  And since I like this picture so much - here comes a close up!