Good evening, this is my first post and glad to meet you guys. We had this Silver Arowana named Dino for like 4 years and it's 31 to 32 inches by tape measure, my sister bought a new one but with the different color, she said that its Malaysian Green and it is really small it is 4 to 6 inches and put it on Dino's Tank. After a while, it was lost and no it didn't jump. Dino ate it! We're very surprised because we didn't know Arowana will eat the same species. Is it normal? My sister is very sad because it costs more and the seller said that it was okay to mix them so she did. Dino's tank size is 200 gallons. Will Dino die? Is it safe to put Arowana with Arowana?