This ^ certainly. A simple overcurrent situation, caused either by attempting to feed a device or devices that draws too much current or by a simple short to ground, will quickly trip any standard breaker. The idea is to protect the wiring, which is rated for a certain amount of current capacity. Rather than allowing the current to exceed that, resulting in a dangerous condition where the wire starts to heat up, a standard breaker trips.
A ground fault breaker does that as well, but in addition it detects an imbalance between the hot and neutral wire that indicates some current is leaking at some point. If the discrepancy exceeds some very small amount, the GFCI trips and thus interrupts that current from leaking somewhere...like through your aquarium water or your arm...as it seeks ground. The GFCI is protecting you rather than the wiring.