Here's what we know:
* Small size: Hatchet fish are known for their incredibly flat, thin bodies, which helps them blend into the water column.
* Species variation: There are around 40 known species of hatchet fish. The smallest are only a few inches long, while some larger species can reach up to 10 inches.
* No reliable weight data: Specific weight information for individual hatchet fish species is not readily available.
Therefore, it's impossible to give a precise weight range without knowing the specific species. However, due to their small size, most hatchet fish would weigh only a few grams.