Fish farming in Tangal, looking towards Mount Ambulong


A stakeholder in a fish farm

The fish farms in Tangal are generally not mechanised to any significant extent

The supply of nutrients for fish stock is largely dependant on tidal flows. A large portion of the fish farms are operating on what was formerly mangrove swamps.

The use of tidal flows for nutrients, avoids the application of costly fertilisers, which would be in any case mostly carried away by the tides.

To restock the ponds, with prawns for example, reliance is put on trapping prawns in water flowing in from the mangrove swamps.

The optimal design for a fish pond appears to incorporate the following principles:

* Be 0.5 to 1.0 metres at the shallow end, and in the range of 1.5 to 2.0 metres at the drain end.
* It should be possible to drain the pond within three days.
* Pond edges have a slope of 2:1 or 3:1 on all sides.
* Advantage taken of the wind to mix the water and aerate it.
* To avoid erosion of dikes at windy sites the long side of the pond put at right angles to the prevailing wind's direction.

Reference: Small Scale Fish Farming I by Leo in Fisheries. (

Control gates between two ponds
White herons looking for food
Fish net accross an inlet canal
Fish net accross the entrance from the main tidal channel into a fish pond
Fish net accross the inlet to a pond
'I am quite sure that fish would never eat me' - Manila Oceanarium
'I sure enjoyed eating those Tangal prawns'
Fish farm ponds