Other nets include the sledge net,a 1 mm mesh size netting that is fitted onto a 60x20 cm aluminum frame that rests on two sledges, which is pulled by hand while wading or from an anchored boat, and the drag net, a rigid rectangular metal frame with a bag net attached, that is used for trawling on hard irregular surfaces.
Larger, typically more mobile epifauna are usually sampled with nets that nets are towed behind a powerboat (Eleftheriou and Holme 1984), such as the otter trawls, a bag net with weighted wooden doors that slide along the bottom and hold the net open.