It depends on how they live.
Actinopterygii (/ˌæktɪˌnɒptəˈrɪdʒiaɪ/), or the ray-finned fishes,
constitute a class or subclass of the bony fishes.
Numerically, actinopterygians are the dominant class of vertebrates,
comprising nearly 99% of the over 30,000 species of fish. They are
ubiquitous throughout freshwater and marine environments from the deep
sea to the highest mountain streams. Extant species can range in size
from Paedocypris, at 8 mm (0.3 in), to the massive ocean sunfish, at
2,300 kg (5,070 lb), and the long-bodied oarfish, at 11 m (36 ft).
I think the angler fish catches prey like its cousin the bass - a sudden gulp. Teeth are to prevent prey from escaping. A bluefin tuna has a jaw like a tiger and teeth to match - for chasing down and catching active prey. Ocean sunfish suck up jellyfish.
In a group as successful, ancient and diverse as these ocean-conquering fish you will have a huge range of lifestyles and adaptations. Which tool is the most efficient, a screwdriver or a pop rivet gun or a claw hammer? Efficiency only makes sense in the context of a given task.