- Issue Date: 1983-07-29
- Withdraw: 1989-08-31
- Designed by: Victor Lages (Des)
- Printed by: Imprensa Nacional Casa da Moeda
- Print Process: Lithography
- Paper: Enamel
- Width: mm
- Height: mm
- Perforations: 12x11½
- Format : Sheet of 50 (5x10)
- Phosphorescent band in stamps
 12.50 Mediterranean monk seal |
 30.00 Short-beaked common dolphin |
 37.50 Killer whale |
  80.00 Humpback whale |
  MC1 Mediterranean monk seal |
  MC2 Short-beaked common dolphin |
  MC3 Killer whale |
  MC4 Humpback whale |
| Image | Value | Perfor | Color | .000 | WM | Ovpt | Stamp Catalogues | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SC[1] | YT[2] | MI[3] | SG[4] | AF[5] | CTW[6] | |||||||
|
12.50 | 12x11½ | Multi | 1.000 | N | N | 1575 | 1583 | 1604 | 0 | 1625 | POR 364-1 |
|
30.00 | 12x11½ | Multi | 600 | N | N | 1576 | 1584 | 1605 | 0 | 1626 | POR 364-2 |
|
37.50 | 12x11½ | Multi | 800 | N | N | 1577 | 1585 | 1606 | 0 | 1627 | POR 364-3 |
|
80.00 | 12x11½ | Multi | 600 | N | N | 1578 | 1586 | 1607 | 0 | 1628 | POR 364-4 |
 |
SS | 12x11½ | Multi | 200 | N | N | 1578A | BF42 | BL41 | 0 | BL59 | POR 364-B |
 |
FDCSS | 12x11½ | Multi | 0 | N | N | 0 | 0 | 0 | 0 | FDCB59 | POR |