This vaguely humanoid plant creature has a body formed of soggy green seaweed and wears crude armor made from seashells.
Environment: Any coastline, any oceans
Organization: 1-16
Proficiency Score: +4
Small; Neutral/Individual; Plant, Aquatic
Armor Class: 19 (+2 Dex, +2 Natural, +1 Size, +4 Proficiency Score)
Hit Points: 70 (7d8+14)
Speed: Land 20 feet, Swim 20 feet
Initiative: +2
| STR | DEX | CON | INT | WIS | CHA | 
| 10 (+0) | 15 (+2) | 14 (+2) | 9 (+0) | 15 (+2) | 12 (+1) | 
Saves:
- Fortitude +6
 - Reflex +2
 - Will +2
 
Skills:
- Athletics +0
 - Perception +6
 - Stealth +2
 - Survival +2
 
Immunities:
- Effects with the electricity, poison, polymorph, psychic tags
 - Asleep, Paralyzed, Stunned Conditions
 
Senses: Passive Perception: 16; Low Light Vision 60 feet, Dark Vision 60 feet
Languages: Druidic, Sylvan, plantspeech
Air Cyst. Seaweed Leshys constantly grow small bulbs filled with air. As an action, they can detach a bulb and give it to another creature. If consumed as an action, this air cyst grants Water Breathing as per the spell for 10 minutes. Seaweed Leshys can have a maximum of four usable air cysts at any one time, and air cysts regrow at a rate of one per 24 hours.
Sneak Attack. The following is applied to any attack that a Seaweed Leshy has advantage with or against any enemy the Seaweed Leshy is flanking with an ally.
- Add 1d8 damage
 
Actions
Slam. Melee Strike +6/+1/-4 (finesse, unarmed) with 4d6 bludgeoning damage.
Spray (20-foot line). Ranged Attack +6/+1/-4 with 1 bludgeoning damage plus Blinded condition DC 16 Fortitude Save.