"The blue ocean blesses the girl."
Translation:Kastor embar riñe ojehiksa.
'Kastra' is the plural form of 'kastor'. For adjectives in the aquatic (and terrestrial) gender, the form is the same in both nominative and accusative (singular or plural) :)
So, for instance, if we switched 'blue ocean' and girl around we'd then have 'Riña kastor embri ojehiksa'.