| Distribution | Characteristics | Venom effects | Biomedical database Diagnosis & Treatment | |||
| Fresh water | Marine environment | |||||
| Injury due to extensive contact/abrasion | ||||||
| Hard consistency 
 Stony corals |  | tropical and subtropical reef areas | sessile; often extend over large areas; stable calcium carbonate skeleton; highly variable growth forms, from flat to highly branched | generally only local | ||
| Spongious/elastic consistency 
 | medically significant species in the coastal waters of the Caribbean and the Pacific | sessile, solitary or in colonies; variable growth forms, flat, barrel-, pipe- and cup-shaped forms; porous surface | generally only local | Biomedical database | ||
| Feather hydroids |  | tropical to cool coastal zones | sessile; feather-like form; flexible, chitin-like supporting skeleton | generally only local | ||
| Soft or gelatinous consistency 
 |  | tropical to cold seas and oceans | free-swimming, in areas close to the coast or in the open sea; no supporting skeleton; many colourless, transparent species; consist of a bell and attached tentacles that may be up to several meters in length | often only local effects, but some species cause severe systemic effects | ||
| Anemones | tropical to cold coastal areas; often in the intertidal zone | flower-like animals with no supporting skeleton; consist of a sessile pedal disk (foot) with a crown of tentacles on top | generally only local | |||
| Marine worms 
 |  | tropical to warm oceans | elongated, segmented body; fine bristles along the sides of the body; largest specimens 1–3 m | generally only local | Biomedical database | |
| Injury due to puncture wound/bite | ||||||
| Barely noticeable wounds/bites 
 Cone shells |  | primarily tropical coastal areas of the Indian and Pacific Oceans | marine snails with shells in the form of a rolled cone; shells often have striking patterns; largest species up to 15 cm; can be dangerous if handled (they are sought after by collectors); sting barely noticeable | hardly any local effects; can be severe systemic effects | Biomedical database | |
| Octopuses, Blue-ringed octopus | generally in tropical to cold seas and oceans; Blue-ringed octopus in coastal waters of Australia | typical octopus form with a "head" and 8 arms; brownish colour with luminous blue rings | Blue-ringed octopus: hardly any local effects, but severe systemic effects; other species: generally only local | Biomedical database | ||
| Sea snakes | river mouths and further upstream; Indo-Pacific region; in Lake Taal, Philippines, and Lake Tegano, Solomon Islands | coastal waters of the Indo-Pacific, from the Persian Gulf eastwards to Japan and southwards to Australia; one species in the open sea as well as on the east coast of Africa and the west coast of Central America | differ from snake-like fishes in that they have no fins or gills; in contrast to terrestrial snakes they have a laterally flattened tail; most common in the shallow coastal waters of Southeast Asia, New Guinea and Australia; bite marks often barely visible | hardly any local effects, but severe systemic effects | ||
| Painful puncture wounds 
 Numerous small injuries 
 Sea urchins and starfish | venomous sea urchins in tropical and warm zones of the Indian, Pacific and Atlantic Oceans; Crown-of-thorns starfish in coral reefs of the Indo-Pacific | bottom-dwelling; venomous sea urchins among both long- and short-spined species; following injuries with long-spined species broken-off spine tips may remain under the skin; Crown-of-thorns starfish covered in massive spines; animals have a diameter of up to 40 cm; large puncture wounds | generally only local, but sometimes also systemic effects | |||
| Single puncture wounds 
 | Catfishes throughout the world in rivers and lakes 
 stingrays in rivers in South America | tropical to cold seas and oceans; greatest variety of dangerous species in tropical coastal waters | many bottom-dwelling species, which sometimes bury themselves or hide in crevices and often have camouflage colouring; some species also in the intertidal zone; accidents occur not only in the water, but also while fishing or preparing the fish | often only local effects, but some species also cause systemic effects | ||
 
 
     
  
 
        
      