burrfish

"The porcupinefish, a type of blowfish, inflated its spiky body when the scuba diver got too close. "

"Before the picnic, we were snorkeling in the clear, shallow water. "

"The child complained that his pencil was blunter than his friend's, making it hard to write neatly. "

"The bouncy ball was perfectly spherical. "

"His sudden appearance surprised me."

"The teacher distinguished the students' excellent essays from the others based on their insightful analysis. "

"The ship ran aground in an unexpected shallow."

"The somewhat of extra help she received from her tutor significantly improved her test scores. "

"He covered the baby with a blanket."

"He threatened me with a knife."

"My younger brother is shorter than me. "

"Try to spot the differences between these two pictures."