It means that Xiaobai and the Blue Fish's defenses are temporarily united. When Xiaobai gets hurt, it will feel the pain; the same goes for the Blue Fish.
But the defense is solidly present.
It makes some sense this way.
If the Blue Fish merely shares its defense without any side effect, that skill would be too overpowered.
But even so, it's still very powerful.
It's like Xiaobai now has 1.5 lives.
"Go have some milk." Lin Chen gave it a bottle of milk to play with, and then wrote about the Blue Fish's condition in the "Blue Fish Evolution Diary."
At this moment, the Big White Bear came forward again, looking hopeful.
But Lin Chen still poured cold water, saying, "It's not your turn yet."
"Wow!"
The Fire Spirit spun around in the air, finally landing steadily on the Big White Bear's head.
"Yes, it's your turn." Lin Chen said.
Now he had successfully reached Level 47, already able to contract the Fire Spirit.
