i am new here from fishindex.com.i came here becouse none of the fishindex members could answer my questions (fishindex is geared more towards community fish keepers and casual hobbiests).i have a red tail barracuda in a 150 gallon.would a wolf fish honestly couse problems for a red tail barracuda?if the wolf fish wont be goodwhat about a silver arawana?the only other thing that cought my interests was an african tiger fish i saw on liveaquaria.com.the thing is that its tank requirements are ridiculous,its price keeps fluctuating between 250 and 500 dollars, and also its not recommended for hoobiests,but public aquariums and profesional research facilities....any suggestions?