Urchin, Hunter

Medium beast, unaligned

Armor Class 13
Hit Points 52 (8d8+16)
Speed 5 ft., swim 15 ft.

15 (+2) 3 (-4) 14 (+2) 1 (-5) 12 (+1) 2 (-4)

Skills Perception +4
Senses passive Perception 14
Challenge 1/2 (100 XP)

Special Traits

  • Amphibious. Hunter urchins can breathe both air and water.
  • Stability. Hunter urchins can anchor themselves to rocky surfaces on any turn in which they do not move. Until they release their hold, they have advantage on Strength (Athletics) checks against being shoved, and on saving throws against any effect that would force it to move. As long as it does not move on its turn, its Dexterity penalty does not apply as a penalty on its attack roll with its tethered spine.


  • Tethered Spine. Ranged Weapon Attack: +3 to hit, range 15 ft., one target. Hit: 4 (1d4 + 2) piercing damage and the target is pulled 5 feet closer to the urchin.
  • Spines. Melee Weapon Attack: +3 to hit, range 5 ft., one target. Hit: 2 (1d4) piercing damage and the target must make a DC 13 Constitution saving throw or be poisoned for 1 minute.


  • Spiny Defense. When a creature makes a melee attack against the hunter urchin, as a reaction it can make a spines attack against that creature. It can use this reaction up to 3 times per round.

Much more dangerous than their smaller kin, giant sea urchins are dangerous predators of opportunity.

Amphibious hunters. Hunter urchins can adjust their spines to effect an awkward method of locomotion on land. They use their tethered hook-spines to draw their prey close enough to stab it into submission and then devour it.

Ravenous Urchins. Unlike most urchins, the creatures that make up the infamous urchin swarms are capable of propelling themselves beneath the waves at furious speeds, creating a dangerous threat to pearl divers and other aquatic creatures, piercing them not only with their venomous spines but also with their rasping tongues. This menace of the reefs and tide pools is often dismissed as a myth until it’s far too late. Colorful tentacles writhe across this marine creature like long petals on an immense flower.

Vermin of the Deep. The largest anemones in the ocean are capable predators despite their plodding movement. They lie in fields of other, usually smaller, anemones and among brightly colored coral societies. Deep tiger anemones feed local scavengers by attacking large prey or schools of fish, scattering uneaten remains to their neighbors.

Section 15: Copyright Notice

Sea Monsters (5E) © 2021, Legendary Games; Authors Michael Ritter, Michael “solomani” Mifsud, Robert J. Grady, Mark Hart, Jeff Ibach, Alex Riggs, Scott D. Young, Jeff Lee, Matt Kimmel, and Jason Nelson.

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