| Main Ref. | Bartley, D.M. (comp./ed.), 2006 |
| To | Tonga |
| FAO area | |
| From | Australia (Townsville) |
| FAO area | |
| Year | 1990 |
| Range | |
| Period | 1975-present |
| Established in the Wild | no |
| Established in Aquaculture | widely used |
| Significant Ecological Interactions | unknown |
| Significant Socio-economic Effects | |
| Introduced by | government |
| Reason | aquaculture |
| Other Reason | |
| Comments | H. hippopus is an indigenous pcs in Tonga but extincted in the fifties. Several thousands 3 months old shells were imported to growing-up ì to spawn arificially for realising. These are still kept in the Ministry's ocean nursery. |