|Siblings:||Herb Star (brother)|
|Children:||Gary the Snail (son)|
|Parents:||Billy Bob Star (father)|
Maw Tucket (Mother)
|Grandparents:||Queen Mildew (Great Grandmother)|
King Amoeba (Great Grandfather)
Princess Tulsa (grandmother)
|Uncles:||Patrick Revere (Great Grand uncle)|
Prince Callous (Grand Uncle)
Prince Dingus (Grand Uncle by marriage)
Patron (several "Great"s Grandnephew)
Prehistoric Gary (Possibly)
|Other relatives:||Margie Star (sister-in-law)|
Carl (1st Cousin 1x removed)
|First appearance:||Seen on family tree in "Rule of Dumb"|
|Latest appearance:||Seen on family tree in "Rule of Dumb"|
|List of characters|
Sluggo is Gary's father and the brother of Herb Star, seen on the Starfish Minister's poster in "Rule of Dumb." At the end of the episode, where the elder starfish found a coffee stain revealing Gary as Sluggo's son, and the rightful king of Bikini Bottom.
- He is never mentioned or appeared in an episode, although he is seen during the episode on the poster. He might have died, but it is unknown why if he did because Gary seems young.
- Given that the right to become King was passed to Gary, rather than Patrick, this implies that Sluggo is the older or younger brother of Herb.
- His surname is likely Star, as that is his brother's surname, which also makes Star likely to be Gary's surname.
- It is possible that Sluggo was adopted, given that he is a mollusc, yet both of his parents are starfish.