Amphibious. The grung can breathe air and water.

Poisonous Skin. Any creature that grapples the grung or otherwise comes into direct contact with the grung's skin must succeed on a DC 12 Constitution saving throw or become poisoned for 1 minute. A poisoned creature no longer in direct contact with the grung can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Standing Leap. The grung's long jump is up to 25 feet and its high jump is up to 15 feet, with or without a running start.

Grumpy Grung Growl. A ferocious gurgling issues from the throat of the Dankwood grung, warning those within 15 feet that they are indeed grumpy. Creatures in that area must succeed at a DC 12 Charisma saving throw or be frightened until the end of their next turn.

Dagger. Melee or Ranged Weapon Attack: +0 to hit, reach 5 ft. or range 20/60 ft., one target. Hit:3 (1d4 + 1) piercing damage in melee, or 3 (1d4 + 1) piercing damage at range. Target must succeed on a DC 12 Constitution saving throw or take 5 (2d4) poison damage.

Shortbow. Ranged Weapon Attack: +5 to hit, range 80/320 ft., one target. Hit:9 (1d6 + 6) piercing damage. Target must succeed on a DC 12 Constitution saving throw or take 5 (2d4) poison damage.