The following is a list of poisonous animals, which are animals that passively deliver toxins (called poison) to their victims upon contact such as through inhalation, absorption through the skin, or after being ingested. They are often distinguished from venomous animals, which actively inject their toxins (called venom) into their victims through a venom apparatus such as fangs or a stinger. The only difference between poisonous animals and venomous animals is how they deliver the toxins. This list deals exclusively with poisonous animals.
Poisonous animals
This list is a partial list of animals that are poisonous to humans and other animals in that their flesh is toxic if consumed, or in some cases if they are touched:
Mammals
Slow loris (usually thought of as venomous, but they also lick their fur, making it toxic)
Birds
Pitohui
Blue-capped ifrit
Shrikethrushes
Spur-winged goose (diet-dependent) Common quail (diet-dependent)
Snakes
Rhabdophis keelback snakes
Garter snake (diet-dependent, when feeding on Pacific newts)
Frogs and toads
American toad
Asiatic toad
Cane toad
Colorado River toad
Common toad
Corroboree frog
European green toad
Fowler's toad
Mantella
Poison dart frog
Salamanders
Pacific newts or Western newts
Fish
Tetraodontidae (Blowfish, Pufferfish) Greenland shark Barracuda (age and diet dependent)
Cephalopods
Blue-ringed octopus
Pfeffer's flamboyant cuttlefish
Insects
Blister beetle
Diamphidia
Cinnabar moth
Certain tiger moths (Erebidae) Birdwings Milkweed butterflies (include Monarch butterfly) Battus (butterfly)
Crustaceans
Gorilla crabs (Xanthidae)
Cnidarians
Some members of the genus Palythoa produce the highly toxic palytoxin
Rhodactis species
Echinoderms
It is common for sea cucumbers like Pearsonothuria graeffei to protect itself with toxins Actinopyga agassizii a toxic sea cucumber Some starfish, like Plectaster decanus, are poisonous
Annelids
The polychaete worm Hediste diversicolor
Halla parthenopeia
Nemerteans
Antarctonemertes valida is one of several nemerteans which make use of defensive toxic secretions
Flatworms
Bipalium kewense, the hammerhead flatworm, is coated in toxic mucus
Sponges
Negombata magnifica, the toxic finger-sponge, is one of many toxic species of sponges