See it’s in my opinion and experience that there are at least two subtypes of gatf, while they both grow massively large and are apex predators, one is obviously broader top down and grow ridiculously fast, (I’ve kept a dozen gatf before and one has outgrew all the rest by a multiplier. Some of you may the familiar with it with its broad body, the one I linked is also of the same nature. This tank in Thailand is absolutely fantastic but I believe the adult gatf in the tank is of the other subtype, which I believe is the more common type. This is just my opinion and observation, can be totally wrong about this.