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

Roger Rose

Additional Voices (voice)