Mertensiidae

{{Short description|Family of comb jellies}}

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{{Automatic taxobox

| image = Mertensia ovum 800x600.jpg

| image_caption = Sea nut in an icy ocean

| image2 = Callianira hexagona.jpg

| image2_caption = Callianira hexagona

| taxon = Mertensiidae

| authority =

}}

Mertensiidae is a family of ctenophores belonging to the order Cydippida.{{cite web |title=Mertensiidae |url=https://www.gbif.org/species/7396 |website=www.gbif.org |access-date=8 April 2021 |language=en}}

Genera:

• Callianira Péron & Lesueur, 1808
• Charistephane Chun, 1879
• Gastrodes Korotneff, 1888
• Mertensia Lesson, 1830