Incidental 90 is a light brown elderly fish who makes background appearances in several episodes, starting with "Mermaid Man and Barnacle Boy." He resides at Shady Shoals Rest Home.
He is a dark tan fish with a light tan dorsal fin, with dark red spots on his head. He wears light red and light blue boxers. He has an underbite.
Role in series
"Mermaid Man and Barnacle Boy"
He is seen playing checkers with the elderly shark at the Shady Shoals Rest Home.
He is seen in the long line in front of the ice cream stand in front of the Cemetery. He questions what Mr. Krabs' problem was when he ran away yelling "Im not old!"
He is seen at the Krusty Krab while the fortune cookies become a big hit.
He is seen at the Krusty Krab with Incidental 87