May act as breeding places for pests and disease carriers.

Silt up easily which makes them shallow, calling for constant dredging which is expensive.

Not suitable for water transport due to sandbars.

Some are swampy and marshy

The ports located on the Lagoons are: Lagos in Nigeria, Abidjan in Ivory coast.

Those on Estuaries: -Banjul in Gambia, Free Town in Sierra Leone, Matadi in DRC.

Continental shelf is defined as submerged portion of Africa. It is part of the continental land which sunk due to increase in sea level. It exists as a shallow place for not more than 200 Metres.