Mullet Fish
Scientific name Mugilidae
Mullet are streamlined, silver-grey fish commonly seen in shallow coastal waters, bays and near sandy shorelines. They have blunt heads, small mouths and forked tails, giving them a simple but sturdy appearance.
Around Koh Tao, mullet are most often spotted in sheltered bays, near piers or over sandy bottoms in shallow water from 1–10 metres. They frequently swim in loose schools and are known for sudden bursts of speed when startled.
Unlike many reef predators, mullet are primarily bottom-feeders. You may see them grazing along sandy areas or stirring up sediment as they feed. Their calm schooling behaviour makes them a familiar and regular sight for snorkellers and divers alike.
They are hardy fish and can tolerate varying water conditions, which is why they are often found near harbours and coastal areas.
Find Mullet Fish at...
Divemaster's tip
Look in shallow sandy areas rather than coral-heavy zones. Early morning dives often provide the best chance to see large schools cruising calmly along the shoreline.
Move slowly — mullet are quick to react to sudden movements.
What do they eat?
Mullet feed mainly on algae, detritus and organic matter found in sand and sediment.
By grazing and stirring the seabed, they help recycle nutrients and contribute to the health of coastal marine ecosystems around Koh Tao.
