Birthfish

A birthfish or a birthday is a event when a person (or a fish in this case) turns one year older.

List of "birthfishes" or birthday-related episodes

 * Jocktopus - "Happy Birthfish, Jocktopus"
 * Albert Glass - "Fishing for Compliments: The Albert Glass Story"
 * Clamantha - "Sixteen Clamandles" (not actually Clamantha's birthday in the episode, storyline involves party planning for her birthday)
 * Bea Goldfishberg - "Bea's Birthday Surprise"