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Tuatara: Volume 16, Issue 2, July 1968

Figure 1: — 1. Anguiflla ausfralis schmidfi (Anguillidae), the New Zealand short-finned freshwater eel — an example of a generalised eel with few specialisations. — 2. Leiuranus semicincfus (Ophichthidae), a tropical sand-dwelling worm eel, showing marked elongation of the body, hard finless caudal tip and reduction of pectoral fin. The spectacular coloration shown is not uncommon in tropical eels. — 3. Cirricaecula johnsoni (Ophichthidae), a tropical sand-dwelling worm eel, showing acute burro…

Figure 1: 1. Anguiflla ausfralis schmidfi (Anguillidae), the New Zealand short-finned freshwater eel — an example of a generalised eel with few specialisations. 2. Leiuranus semicincfus (Ophichthidae), a tropical sand-dwelling worm eel, showing marked elongation of the body, hard finless caudal tip and reduction of pectoral fin. The spectacular coloration shown is not uncommon in tropical eels. 3. Cirricaecula johnsoni (Ophichthidae), a tropical sand-dwelling worm eel, showing acute burrowing snout with modified nostrils and labial cirri. 4. Rhinomuraena ambonensis (Muraenidae), a tropical moray with expanded antetior nost. ils. 5. Brachysomophis crocodilinus (Ophichthidae), a tropical sand-dwelling worm eel, with marked enlargement of jaws and teeth and a labial posterior nostril. 6. Taenioconger hassi (Heterocongrinae, Congridae), a tropical sand-dwelling congrid with reduction of jaws and enlarged eyes. 7. Simenchelys parasiticus (Simenchelyldae), a deep sea eel with a mouth adapted for parasitic feeding. 8. Nemichthys scolopaceus (Nemichthyidae), a deep sea mesopelagic eel with extended jaws and filamentous caudal region. 9. A portion of a “colony’ of Taenioconger hassi (Heterocongrinae) shown burrowed in coral sand. Abbreviations: af—anal fin, an—anterior nostril, ba—branchial aperture, c—tip of caudal region, cf—filamentous caudal region, df—dorsal fin, ej—extended jaws, fp—fleshy processes of jaws, Ic—labial cirri, pf—pectoral fin, pn—posterior nostril, v—vent.

Figure 1:
1. Anguiflla ausfralis schmidfi (Anguillidae), the New Zealand short-finned freshwater eel — an example of a generalised eel with few specialisations.
2. Leiuranus semicincfus (Ophichthidae), a tropical sand-dwelling worm eel, showing marked elongation of the body, hard finless caudal tip and reduction of pectoral fin. The spectacular coloration shown is not uncommon in tropical eels.
3. Cirricaecula johnsoni (Ophichthidae), a tropical sand-dwelling worm eel, showing acute burrowing snout with modified nostrils and labial cirri.
4. Rhinomuraena ambonensis (Muraenidae), a tropical moray with expanded antetior nost. ils.
5. Brachysomophis crocodilinus (Ophichthidae), a tropical sand-dwelling worm eel, with marked enlargement of jaws and teeth and a labial posterior nostril.
6. Taenioconger hassi (Heterocongrinae, Congridae), a tropical sand-dwelling congrid with reduction of jaws and enlarged eyes.
7. Simenchelys parasiticus (Simenchelyldae), a deep sea eel with a mouth adapted for parasitic feeding.
8. Nemichthys scolopaceus (Nemichthyidae), a deep sea mesopelagic eel with extended jaws and filamentous caudal region.
9. A portion of a “colony’ of Taenioconger hassi (Heterocongrinae) shown burrowed in coral sand.
Abbreviations: af—anal fin, an—anterior nostril, ba—branchial aperture, c—tip of caudal region, cf—filamentous caudal region, df—dorsal fin, ej—extended jaws, fp—fleshy processes of jaws, Ic—labial cirri, pf—pectoral fin, pn—posterior nostril, v—vent.