Hemogoblin Shark

The Hemogoblin Shark is a Hardmode enemy that can be spawned by fishing during a Blood Moon event. When the bobber dips and the player attempts to reel in a fish, a Hemogoblin Shark, among other enemies, has a chance to spawn within a few blocks of the bobber in place of a fish.

Tips

 * The Hemogoblin Shark can move incredibly fast in water, jump very high, and has a large pool of health. This makes it a dangerous enemy for those starting out in Hardmode.
 * Building a platform high above your fishing spot allows you to dodge the Hemogoblin Shark's lunging attacks, though it can still hit you with its blood spit attack.

Trivia

 * The name 'Hemogoblin Shark' is a portmanteau of "hemoglobin," an oxygen-carrying protein found in vertebrates which is responsible for giving blood its red color, and "goblin shark," a rare and ancient species of shark native to the deep waters of the Eastern Atlantic.
 * The Hemogoblin Shark's Bestiary entry — "Half-shark, half-goblin, completely murderous!" — references the Minishark's tooltip.