Continuity mistake: The boulder that Mickey throws at the seagull was not on the big rock when he first started chasing the bird.
Continuity mistake: When the seagull puts Pluto's tail through his collar, Pluto drops the bucket he is holding in his mouth. In the next shot, the bucket is nowhere to be seen.
Continuity mistake: When Pluto sees the seagull in the bait bucket, he drops Mickey's hat which he is holding in his mouth. When Pluto growls at the seagull, Mickey's hat is nowhere to be seen.
Continuity mistake: Throughout the cartoon, watch Mickey's bait bucket. In some shots, the word "Bait" is printed on the side; in other shots it is missing.
Continuity mistake: When Mickey is fishing, there is initially a bucket behind him. When we see Mickey fishing later on, his hat appears from nowhere.
Continuity mistake: When Mickey is about to put the hook through the fish, you can see in a long shot that Mickey's hand is above the fish, holding the hook. However, in a close-up of the fish, Mickey's hand is nowhere to be seen.
Continuity mistake: When Mickey tosses Pluto a sausage, Mickey is wearing a hat on his head and there is a bottle behind him. When Mickey says "Too bad, pal!" the hat and bottle have both disappeared.
Continuity mistake: When Mickey is laughing at Pluto, the pink label on the bottle behind Mickey is at the top. When Mickey catches the mussel, the label is now at the bottom.
Continuity mistake: When Mickey takes the pepper pot out of his lunch box, the label on the pot is coloured pink. When the mussel in Pluto's mouth grabs the pepper pot, the label is now coloured grey.
Continuity mistake: When Pluto has a mussel stuck in his mouth, Mickey is eating his sandwich and you can see that the sandwich has a bite mark on it. When Mickey says "OK!" the bite mark has gone.
Continuity mistake: When Pluto goes to show Mickey the mussel stuck in his mouth, the items inside Mickey's lunch box change between shots.
Continuity mistake: When Pluto pulls the mussel on his tail like a yo-yo, the mussel gets stuck in his mouth and you can see there is nothing on the sand dune behind him. In the next shot, the sand dune now has grass on it.
Continuity mistake: When Pluto digs up a hole on the beach, he leaves some sand behind him. When Pluto approaches the mussel on the rock, the sand that he dug up a few seconds ago has disappeared.
Continuity mistake: Mickey Mouse is wearing a hat and fishing when a seagull lands atop his hat. The seagull is facing Mickey's right but when Mickey looks down to see their shadows, the shadow of the seagull shows him facing Mickey's left.
