diver257a: Is it worth to go there? I saw its also possible to dive with sea lions and should be possible to find leafy or weedy sea dragons. But costs for diving are pretty high. Therefor i'm wondering if its worth it.
I noticed that your shopping list has grown a bit
KANGAROO ISLAND (aka KI or the island as opposed to the mainland) is a place worth visiting (& diving) if you have not been there before. It is a destination that does attract praise, e.g. please look at post #6 in the following thread -
http://www.scubaboard.com/forums/au...-adelaide-march-april-2010-a.html#post5510330 However, it is expensive. I have been 4 times & probably would not go again (apart from day trips to the north east coast). From a Adelaide perspective, it is easier & probably cheaper to go overseas.
LIONS/SEALS - I suggested Hopkins Island and Baird Bay in an earlier post because these sites are very reliable, i.e. near breeding colonies with sizeable populations. Sealions/Seals are very common in Australian temperate waters and are regularly seen by divers. The main colony on KI (i.e. Seal Bay) is a proclaimed conservation park where swimming & diving is prohibited. You are likely to see sealions/seals on KI, however these will probably be solitary animals.
LEAFY & WEEDY SEA DRAGONS (LSD/WSD)- while the dive operator on KI does offer dives with these fish, these can be seen at a number of sites accessible from the mainland with relative ease - please search my posts for more info.
On the basis of your OP, I would probably suggest a trip to Baird Bay where the operator is exclusively focused on sealions/seals and then arrange 1 or 2 days diving with an Adelaide LDS to dive at one of the 'mainland' sites where LSDs are present. Alternatively, one of the Port Lincoln charter operators does offer swims with seals - refer
http://adventurebaycharters.com.au/swim-with-sea-lions/.