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Poisonous animals
Cnidarians (Jellyfish, Corals and Anemones)
Venomous fish
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Batrachoididae, Toadfishes

Clinical entries

For clinical data see section “Risk” below


Genera: Barachatus, Batrachoides, Halophryne, Maregravichthys, Opsanus, Thalassophryne
Venomousness questionable in many species.


Osteichthyes; Batrachoidiformes; Batrachoididae

Common names

Toadfishes, Frosch- oder Krötenfische



Tropical to cool coastal waters of the Atlantic and Indo-Pacific. North Sea, Mediterranean, Black and Red Seas, Persian Gulf.

Fig. 4.25 Thalassophryne reticulata.



Bottom-dwelling marine fishes, some also found in brackish water in river mouths and a long way upstream. The head is wide and flattened, with a large upward-facing mouth. The eyes are also directed upwards. They are excellent at camouflaging themselves by changing colour to blend in with the ocean bottom. They usually hide under stones, seaweed or in hollows or partially bury themselves in loose sediment.

The anterior dorsal fin is small and possesses 23 spines. In addition, there is a spine located on each of the gill covers. In some species, the spines contain an internal venom duct and are surrounded by a gland. This type of spine is unique to these fishes. However, it is not certain whether the gland secretions are toxic. Closer examination of Halophryne diemensis, commonly considered venomous, revealed an absence of venom glands and hollow spines (Cameron and Endean 1972). In general there are no known venomous species amongst the Australian toadfishes. When threatened they erect their dorsal fins and gill covers. Accidents are generally the result of treading upon one of these well-camouflaged fish. There have been no reports of active attacks by means of the gill spines, as has been observed with weeverfishes.



There is little information on accidents with toadfishes. Envenoming (if it is actually possible) appears to be restricted to local symptoms.



Literature (biological)

Cameron and Endean 1972, Colette 1966, Halstead 1988, Pietsch and Grobeker 1987