I. australis
# I. australis

I. australis may refer to:

* Ictalurus australis, the bagre del panuco, a fish species endemic to Mexico
* Ichthyococcus australis, the Southern lightfish, a fish species
* Icichthys australis, the southern driftfish or ragfish, a medusafish species found around the world in all southern oceans
* Indigofera australis, the Australian indigo, a leguminous shrub species
