the jellyfish: pelage noctiluca

thanks Lombard

 For the fungia, you need to take a picture of the back of the skeleton. there is few expert, you can contact Prof Michel Pichon or Pr Carden Wallace. 

Good luck!

The first image is a zoantharian, likely Zoanthus sp.

Second/Third image: Genus Actinoptilum or Echinoptilum 

Fourth image: Mushroom coral- Fungia seychellensis

Reference:

http://www.arkive.org/mushroom-coral/fungia-seychellensis/image-G73055.html

Fifth image: Mauve Stinger- Pelagia noctiluca

Here are some references:

http://www.planktonchronicles.org/en/episode/pelagia-fearsome-jellyfish

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2579739/

Last image: Sea pen- Protoptilum carpenteri

Reference: 

http://www.biomedsearch.com/nih/global-diversity-sea-pens-cnidaria/21829500.html

Please correct me if I am wrong.

Stephanei..thank u

 Fifth image will be Pelagia sp.