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Phylum Chordata > Subphylum Vertebrate > fishes > Family Monacanthidae
Seagrass filefish
Acreichthys tomentosus*

Family Monacanthidae
updated Feb 11

Where seen? This filefis with broad bars h is often seen on many of our shores, among seagrasses and seaweeds on coral rubble.

Features: To 12cm, those seen about 7cm. Triangular skin flap on the belly, tail without filaments. The enlarged stiff dorsal spine has 7-9 small downward pointing spines. There is a spine above the back end of the eye. Top of the head strongly concave. Body with olive or brown mottles or spots, an irregular curved light yellow line along the front of the body from the gill opening to over then end of the anal fin.

Sisters Island, May 09
Tail fin has 2-3 curved dark brown bars. The similarly shaped Fan-bellied filefish (Monacanthus chinensis) can grow much bigger and has broad bars on the body instead of spots.

What does it eat? It feeds on small creatures that live on the bottom such as amphipods, worms and snails.

Sisters Island, May 09

Seagrass filefishes on Singapore shores


Tanah Merah, Jul 11


Sentosa, Aug 04


Pulau Hantu, Jun 08

more photos of seagrass filefishes on Singapore shores
northern shores
southern shores part 1 | part 2 | part 3 | part 4 | part 5

*Identification needs confirmation. Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.

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