Michael Bell

Allstar Seaworthy/ Bigweed/Elder #4

B.J. Ward

Casey Kelp/ Lil' Seaweed

Frank Welker

Tooter Shelby/ Occy/ Grandpa Wetworth/ Great Snork Nork/ Finneus

Nancy Cartwright

Daffney Gilphin

Barry Gordon

Junior Wetworth/ Governor Wetworth

Edie McClurg

Ms. Seabottom/ Mrs. Seaworthy

Clive Revill

Dr. Galeo Seaworthy (voice)

Fredricka Weber

Willie Wetworth

Gail Matthius

Smallstar Seaworthy

Rob Paulsen

Corky

Roger DeWitt

Jo-Jo

René Auberjonois

Dr. Strangesnork

Joan Gerber

Mrs. Kelp

Robert Ridgely

Mr. Kelp

Brian Cummings

Dimmy Finster

Mitzi McCall

Auntie Marina

Bob Holt

Mr. Seaworthy

Joan Gardner

Mrs. Wetworth