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Phylum Chordata > Subphylum Vertebrate > fishes
Photo index of fishes on Singapore shores
Long fishes: resembles eels, snakes, worms

Black
eeltail catfish

Plotosus canius

Striped
eeltail catfish

Plotosus lineatus

Sea catfish
Family Ariidae

Yellow cuskeel
Dinematichthys iluocoeteoides

Blenny
awaiting identification
4-5cm, to 90cm-1.5m. Eel-like tail, plain dusky-brown to black colour with a black dorsal fin tip and a pale belly. In adults, the long barbels can reach past the eyes. Near seagrasses. Commonly seen on our Northern shores. 2-15cm, to 90cm-1.5m. Eel-like tail, two or more white lines on dark body. The lines are faded in old adults. In adults, the long barbels don't reach past the eyes. Among seagrasses, coral rubble and reefs. Commonly seen on our Southern shores. To 20-30cm. Tail fin forked. 3, rarely 2 pairs of barbels. Not commonly seen on the intertidal, but sometimes caught by fishermen. 7cm. Small tail fin separated from long dorsal and anal fins. Small eyes, no barbels. Scales on head, cheek and body. Coral rubble near seagrasses. Sometimes seen on some of our shores. 10-15cm. Body long flattened body with blunt head. Near seagrasses. Sometimes seen on some of our shores.

Esturaine moray eel
Gymnothorax tile

Brown-spotted moray eel
Gymnothorax reevesii

Brown moray eel
Uropterygius concolor

Carpet eel-blenny
Congrogadus subducens

Bearded filefish
Anacanthus barbatus
20-30cm, to 60cm. Reddish-brown with numerous yellowish-white speckles. These speckles may fade in large adults. No pectoral fins, no scales. Coral rubble, near reefs. Sometimes seen on some of our shores. 30cm, to 60cm. Brown with dark brown spots. No pectoral fins, no scales. Sometimes seen on some undisturbed shores To 50cm. Plain brown without spots. No pectoral fins, no scales. Rarely seen. 10-15cm, to 30cm. Floral markings. Has pectoral fins. Tail is eel-like with the dorsal, anal and tail fins continuous. Coral rubble. Commonly seen on many of our shores. To 35cm. Body flattened sideways, long tail fin, tiny upturned mouth, barbel under the chin. Rarely seen.

Worm-eel
Muraenichthys sp.

Burrowing snake-eel
Pisodonophis crancrivorous

Sand diver
Family Trichonotidae
   
10-12cm, to 20cm. Body long and worm-like. No pectoral or tail fins, no scales. The tip of the tail is sharp. Small eyes and mouth. Coral rubble, living reefs. Commonly seen on our Southern shores. 30-40cm. Body long and snake-like. No pectoral or tail fins, no scales. The tip of the tail is sharp. Small eyes and mouth. Coral rubble, living reefs. Sometimes seen on our Southern shores. 8-10cm. Long slender body, pointed snout. Hides in sandy areas near reefs. Sometimes seen on our Southern shores.    

These are NOT fishes

Banded file snake
Acrochordus granulatus

Dog-faced water snake
Cerberus rhynchops

Yellow-lipped sea snake
Lauticauda colubrina

Ribbon worm
Phylum Nemertea

Peanut worm
Phylum Spincula
1m or more. Black or brown bands on white or beige, bands are broad on the top but narrows at the sides. Near mangroves in seagrass areas. Sometimes seen on our Northern shores. About 1m. Irregular bands of grey, brown or olive on beige. Dark streak through the bulging eye to the neck. In mangroves. Commonly seen on our Northern shores, sometimes on our other shores too. About 1.4m. Bluish-grey, smooth scales and regularly spaced black bands. Upper lips yellow, tail flattened into a paddle-like shape. Coral reefs and rubble. Sometimes seen on our Southern shores. Up to 1m long. Soft bodied, these are worms. 5-10cm. Unsegmented worm. Ridges on body like the texture of a peanut shell. It is a worm.

how to tell apart


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photo index of
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all fishes

typical fish-shape

  small < 5cm
medium 5-10cm
large > 10cm

globular
round, ball-like

flattened fishes
flattened downwards
  sting rays
others

disk-shaped
flattened sideways

long
  eel-, worm-like
stick-like

others

  mudskippers
odd shaped
living w others
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