Dog Face Pufferfish

Snapshot: Balloon-like body, large expressive eyes, and a puckered mouth, these puppy-dog pals are downright irresistible. They have a cartoonish appeal that's impossible to ignore! 
 
Other tidbits: Can grow up to 33cm or so. Native to the waters of the Indian Ocean and the tropical waters of the Pacific Ocean including the Eastern Australian coast. This fish relies on its pectoral, dorsal, and anal fins for seamless navigation.
 
Bare bones must know: Live-rock fish-only system, or fish-only system. Top-notch filtration to cope with messy eating habits. Use a container, not a net, for transfer to prevent stress. Handle with extreme care, its defense mechanism, tetrodotoxin, is lethal. When threatened or when it dies, it releases a toxin deadly to other tank mates. Best kept in its own aquarium.