English is a language of contradictions, quirks and other stuff. But it follows a few 'good' rules like: cactus becomes cacti, fungus becomes fungi etc. So why should we stop with those words if we can grant walrus its deserved and promised better plural: walri.
Walri has many advantages over walruses; it is way easier to pronounce as wal-ri has only 2 syllables whilst wal-ru-ses has 3, yes, you heard it THREE, syllables which is heresy. And additionally walri has a way smoother pronunciation than walruses, try it out for yourself!
Many say that the plural of walrus is walruses because the word is of Germanic origin and should follow the 'standard' rule of '+ (e)s'. Walruses is presumed to be of Dutch origin, so it could be logical for the plural to be walruses, however walruses is actually a insult invented by the Dutch during the Walrus-Dutch war of 1848. And the fact that the plural of walrus is actually a insult to such perfect creatures is unacceptable.
The solution isn't very far away, the plural should be walri, it's latin-style pronunciation is far more neutral from a standpoint of history and as mentioned before it has a smoother and easier pronunciation. And you can help this cause, from now on use the plural of walri.