Why is the daughter of the crab boss a whale in Spongebob?

this should start with the adventure of the crab boss.

When Mr. Crab was young, he once heard that there was a unique seasoning that could make the most delicious Royal Crab Castle in the most sinister and gloomy seaweed mountain in the ocean, but there were several terrible monsters guarding it. At that time, the poor crab boss set off with the determination to die.

After many difficulties and obstacles, Boss Crab came to Algae Mountain. But just at the foot of the mountain, a giant octopus suddenly appeared and entangled him. The crab boss tried his best to cut the octopus's tentacles with crab pliers before he could escape. The crab boss who escaped from the birth has not slowed down yet, and he is trapped by the jellyfish group. The jellyfish group has static electricity, but the crab boss can't touch it. Seeing that he will become a delicious meal of the jellyfish group, unexpectedly, the crab boss used his quick wits to tell twenty cold jokes, and the jellyfish group lost its discharge ability at once, so the crab boss took the opportunity to escape.

Finally, the crab boss climbed the seaweed mountain, but I didn't expect that there was not only no seasoning, but a huge sperm whale waiting there. Crab boss was about to slip away, but the seaweed mountain happened to erupt and woke up the sperm whale. The giant sperm whale swallowed the crab boss in one bite, and the crab boss chopped around in the whale's belly, which did not hurt the whale. After telling countless cold jokes, the whale remained unmoved. Just as the crab boss was desperate, a cry came from the darkest corner of the whale's belly. It turned out that this was a pregnant female sperm whale. The witty crab boss suddenly remembered that he told a story to the little whale in his belly every day and told him that he was a crab. . .

Not long after, the little whale was born, and the happy sperm whale repeatedly called for her daughter, but the little whale said that she was not her mother, and her mother was a crab. The sperm whale with grief and indignation screamed at the sea, vomited blood and died, along with the whale blood, and the crab boss who had been in her belly for a long time.

The crab boss who escaped from the world covered in blood was not filled with emotion. He went through many difficulties but didn't get the legendary seasoning. Sad, he took out the last crab castle he had prepared when he set out from his backpack and wept while eating. Unexpectedly, the taste of this crab castle has become extremely delicious. When the crab boss looked intently, it turned out that the blood of the sperm whale was stained on the crab castle. Crab boss suddenly realized that the legendary seasoning turned out to be sperm whale blood. But the sperm whale is dead, how can we ensure a steady supply of sperm whale blood in the future? Just as the crab boss was at a loss, he found the little sperm whale looking at him innocently and shouting "Dad". . .

Since then, although no one has ever asked why the Royal Crab King Castle can only be rationed at the end of each month, and no one has ever asked why the crab owner has a whale daughter, this has not affected the Royal Crab King Castle from then on to become famous all over the world and become a deep-sea delicacy.