| Animal | Features |
| 1. Blister beetle (Lytta vesicatoria) | Canthridine (poison) causes blisters. Body hairs of certain insects have basal unicellular glands putting poison, often causing urticarial rash |
| 2. Stinging insects | They (honey bee, wasps and stinging ants) have poison apparatus |
| 3. Scorpions | They have a terminal sting and poison glands |
| 4. Sepia (Cuttlefish) | Its Ink glands are for ‘smoke screening’ rather than poisonous |
| 5. Hydrozoan Cnidaria (e.g. Physalia) | Sting by their batteries of nematocysts, can paralyze small prey with hypnotoxins |
| 6. Catfishes | Their poison glands at the bases of the fin rays |
| 7. Puffer fish (Tetrodon cutcutia) | It has poison glands producing Tetrodotoxin, which blocks sodium ion channels in the cell membranes |
| 8. Heloderma | The only poisonous lizard. Mild poison in the sublingual salivary glands |
| 9. Poisonous snakes | Their venom (Poison) glands are modified labial glands |
| 10. Echidna (Spiny ant eater) | It has crural/ tarsal glands on the legs (Male only) |
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