how many different types of vittatus are there??anyone have a good link with all of them??my lfs got some in today and i dont know if i should pick one up,or two.
There is only one valid species called Hydocynus vittatus. If you want to know synonyms of vittatus look at fishbase.
You can find all valid species of the genus Hydrocynus there also.
If you want to get information about their behaviour in captivity you should use the search engine at MFK. You will see you will get all your questions answered by the MFK community.