Physalia megalista is a marine hydrozoan found in the Atlantic, Indian, and Pacific oceans.
Taxonomy In the 20th century, P. megalista was considered a synonym of P. physalis. However, Gershwin et al. (2010) synonymized megalista with P. utriculus.Gershwin, L., Zeidler, W., and Davie, P.J. (2010). Medusae (Cnidaria) of Moreton Bay, Queensland, Australia. Mem. Qld. Museum 54, 47–108. A 2024 study using specimens from around the world identified P. megalista (with a long and slender pneumatophore as a distinct species, further noting that the neotype designation for P. megalista was invalid.
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