It is widely distributed in the southern hemisphere, particularly in the Antarctic and sub-Antarctic regions.

[2] It has a semispherical to ovoid form with a large, deep oscule on the upper surface.

[2] These spicules are most dense at the base, where they entangle to form a stalk that attaches the sponge to the substrate.

[4] This includes Halacarellus obsoletus, a mite that is believed to be an obligate associate of glass sponges.

[7] While the chemical defenses against predation in glass sponges are poorly known, Rossella antarctica has been observed to contain a chemical compound that has been shown to act as a deterrent against Odontaster validus at the very least.