octopus 可数么

Deep down in the sea, Oliver, a little octopus(章鱼)sat on the floor covered with sand, bored and upset. He watched pretty fish swimming in and out of rocks, which were laughing and dancing in the sea. “Why am I so different?” he said to himself sadly.
“You are an octopus, Oliver. That’s special.” The sweet voice of Cherub, a beautiful purple angelfish (神仙鱼), always made Oliver feel better. Oliver looked up at the purple angelfish and smiled. Cherub suggested, “Let’s play hide-and-seek (捉迷藏).” They were having so much fun that they didn’t realize they had swum far from home. Suddenly, Cherub saw a large shark (鲨鱼) swimming above them. “It was Big White… the biggest, scariest shark in the sea,” she shouted to Oliver. Cherub looked at Big White hopelessly. She was too frightened to swim. Just at this moment, Big White rushed down toward them. An idea came to Oliver. He quickly sprayed (喷射) a very dark cloud of black water to the shark’s eyes. Then Oliver and Cherub escaped and got home safely.
“Are you OK?” asked Oliver. I am lucky to have you as my friend!” Oliver’s face turned red. “I guess being different can be pretty cool in some situations,” Oliver said. “That is what I tried to tell you,” Cherub smiled.
根据短文内容判断正、误。
（注意：考生将答题卡相应位置涂黑。正确的涂“A”，错误的涂“B”）
小题1:In the beginning, Oliver laughed when he saw pretty fish swimming around him.
小题2:Oliver and Cherub were enjoying themselves when Cherub noticed Big White swimming above them.
小题3:Cherub was brave and calm when she faced the unexpected danger.
小题4:Oliver’s quick mind and action saved Oliver himself and Cherub.
小题5:From this passage, we know we have our own advantages in all situations, though we are different.