Icy Merman

Type	Enemy
Environment	Ice biome
AI Type	Fighter AI
Damage	60/120/180 (melee); 74148222 (Icewater Spit)
Max Life	280/560/840
Defense	30
KB Resist	50%/55%/60%
Banner	Icy Merman Banner
Immune to
Debuff	Chilled
Debuff tooltip	Your movement speed has been reduced
Chance	100% (Icewater Spit)
Duration	25 seconds50 seconds1 minute 2 seconds
Debuff	Frozen
Debuff tooltip	You can't move!
Chance	10% (Icewater Spit)
Duration	0.5–2 seconds1–4 seconds0.75–5 seconds
Coins	51250
Hurt	https://terraria.wiki.gg/wiki/File:NPC_Hit_1.wav
Killed	https://terraria.wiki.gg/wiki/File:NPC_Killed_1.wav

The Icy Merman is a Hardmode enemy found in the Ice biome. Upon gaining line of sight to the player, it will stop in place and begin firing Icewater Spit projectiles similar to those fired by the Frost Staff, but with less frequency. Its projectiles also behave similarly to those of the Ice Elemental, but deal less damage and is fired more rapidly. The Icewater Spit attack always inflicts the Chilled debuff, and has a 10*1/10 (10%) chance to inflict Frozen.

Tips

As the Icy Merman stops in place when firing at the player, it is easily dispatched with a long-ranged weapon that fires more rapidly than its Icewater Spit attack, such as the Phoenix Blaster. This will easily lock it in place. Alternatively, if the player can use cover to get close to it without being hit by its projectile attack, it is vulnerable to melee weapons. However, if the player is caught by its projectile and gets Chilled, it will be far more difficult to get into close range without being hit by more of their attacks.
A Nimbus Rod can be used to kill them effectively while they stand still.

Trivia

Despite being a Merman, it cannot swim and does not gain increased mobility in water.
The Icy Merman's pre-1.3.5 sprite is a re-color of the Merfolk sprite granted by the Neptune's Shell and its upgrades.
- The Zombie Merman's sprite is similar to the Icy Merman's new sprite.

The Bestiary entry for the Icy Merman: "Mermen rarely stray far from the ocean. Those that do can become lost, wander into cold caverns, and become icy undead fish men."