```json
{
"prompt": "A detailed illustration of a fish with a prominent dorsal fin on its back, swimming gracefully in a clear blue ocean. The fish is depicted with vibrant colors and intricate scales, showcasing the dorsal fin as the central feature. The background includes coral reefs and other marine life to enhance the underwater scene. The style is realistic yet colorful, with careful attention to light, shadow, and texture to create a three-dimensional effect. Ensure no text is included in the image to avoid any potential errors.",
"explanation": "这幅插图展现了一条鱼在清澈蓝色海洋中优雅游动的场景，突出了鱼背部中央的背鰭。鱼的鳞片和顏色鲜艳且细致，背鰭作为画面的中心元素。背景中的珊瑚礁和其他海洋生物增强了水下场景的真实感。这样的设计不仅能够吸引学生和学华语的人士，也能有效地传达“背鰭”这一词的含义和特征。",
"alt": "一条鱼在海洋中游动，背部中央的背鰭显著。",
"title": "一条鱼在清澈蓝色海洋中优雅游动的场景，突出了鱼背部中央的背鰭。这幅图片有效地传达“背鰭”这一词的含义和特征。"
}
```
