Queen Amphitrite is a medium-sized light blue mermaid with long, flowing black hair and purple hoop earrings. She has a blue tail and a belly button. She also wears a golden crown, a belt, a green bra with light purple clam shells and two golden clasps on each of her wrists.
Her first unused design was drawn by Robertryan Cory, and it was slightly different. She had bigger eyes, a different belly button, and no bra; only clam shells. This design looks a lot more like her appearance in "Trident Trouble."
Amphitrite is kind and motherly to SpongeBob, but strongly dislikes Mr. Krabs because of his selfish and cheap ways. She disapproves of Neptune always sulking about his son, Triton, not following in his footsteps.
In "The Clash of Triton," she tries all she can to cheer King Neptune up for his birthday. She knows her son, Triton, is very un-kingly and tries to be a normal boy, and that worries her since they are gods. She seems to have a negative attitude towards Mr. Krabs, and continually zaps and scolds him.
She appears happy reunited with Triton at the end of Neptune's birthday party. She likes her husband very much. She has little interaction with her son Triton and is not seen in the flashbacks involving him, which may mean that she agrees with his ways, though it is obvious that Neptune doesn't.
She is aware that the Krusty Krab is very popular and decided to have the 5,000th birthday party of Neptune there. She kindly waves goodbye to the Bikini Bottomites in the end.
In "Trident Trouble," King Neptune tells her a story about him and the Greek god Zeus. She laughs at it but then stops when she sees two Krakens approach. She digs into the sand and buries herself while Neptune tries to fight them.
The Clash of Triton (PC game) - Queen Amphitrite's trident falls near SpongeBob and Patrick along with King Neptune's allowing for both of them to gain god-like powers (strangely, she doesn't appear throughout the game but it's assumed she's within the Krusty Krab as a prisoner).
The Clash of Triton (online Nick.com game) - She is mentioned.
Bikini Bottom Chess (online Nick.com game) - She is the queen of SpongeBob's "good" side, while Neptune is the king. Her counterpart on the "evil" side is Karen and Neptune's counterpart is Plankton.
She is a spoof of Amphitrite, a Greek, sea-goddess, and wife of Poseidon.
Amphitrite was originally rumored to be a computer like Karen.
She hardly seems to be close to Triton, but she was probably proud of him for changing his ways as much as Neptune.