This lack of information has resulted from the difficulty of studying members of this genus due to the great depths at which they are located.

[2] Additionally, the phylogenetic placement of this genus has been often debated, with some authors in the past classifying Hebellidae as a subfamily of the family Lafoeidae.

[2] The different species of the genus Halisiphonia, vary significantly in distribution, having been found by researchers in numerous locations throughout the world.

Halisiphonia megalotheca was found at depths exceeding 3000 meters in the Atlantic Ocean in regions between southern New England and Bermuda.

[2] The long pedicels, around 11mm on average, of the species comprising Halisiphonia make them visually distinct from other members of the family Hebellidae.

[2] The specific details of the Halisiphonia diet are unknown, but broadly, hydrozoans in the polyp form are carnivorous and tend to feed on smaller organisms.