Everything seemed so peaceful, but there was this day when Goby Fish suddenly said, “Hey! CoCo Worm! What happened to your feathers?”
All the tankmates looked at CoCo Worm. Normally, CoCo had two crowns full of feathers, which it uses to filter feeding, but now CoCo had only one up on its head.
“Poor CoCo, how did you lose your crown?” Clown Fish asked sadly.
CoCo, who had just woken up, was confused, “What? What are you talking about? My crowns are still up there.”
“Yes, you’re right, but one of them has lost all of its feathers,” Clown Fish said.
“Someone …show more content…
“CoCo is so sensitive and even if I really touched it, it would hide into its tube! I would not have been able to touch its feathers anyway!”
“Yes, but if you just touched the feathers, your poisonous tentacles would simply pull them off.”
“My poison can only kill someone; it cannot physically remove anything. CoCo’s feathers have clearly been damaged by physical force.”
All tankmates then started to suspect one another and quarrel.
“Relax, everyone. I believe no one hurt me last night. If anyone really tried to do that, I would have retreated into my calcium carbonate tube,” CoCo said proudly, though its bald crown made it look funny.
“I can break that easily, kid,” Mantis Shrimp in the other tank cut in.
“But you’ve never been in the same tank, bro,” said Snapping Shrimp, Mantis Shrimp’s best buddy.
“Then what could have happened to CoCo’s feathers?” Basslet Fish asked.
“I guess . . . maybe they just fell off by themselves,” CoCo said slowly. “Oh! It must be the low total alkalinity level in the tank. Yeah, that must be the reason.”
“Oh yeah, we can even feel it now,” all the other corals said in chorus.
That afternoon, Jerry changed the water and added some bicarbonate salt to raise the alkalinity. Everything returned to normal—calm and