Mackerel is a common name applied to a number of different species of pelagic fish, mostly from the family Scombridae. They are found in both temperate and tropical seas, mostly living along the coast or offshore in the oceanic environment.
The guenons are Old World monkeys of the genus Cercopithecus. Not all members of this genus have the word "guenon" in their common names; also, because of changes in scientific classification, some monkeys in other genera may have common names that include the word "guenon". Nonetheless, the use of the term guenon for monkeys of this genus is widely accepted.
Holohalaelurus is a genus of deepwater catshark belonging to the family Pentanchidae, commonly known as Izak catsharks or hallelujah sharks.
The white-spotted Izak or African spotted catshark is a species of shark belonging to the family Pentanchidae, the deepwater catsharks. It is found in the western Indian Ocean off the coasts of Natal, South Africa, southern Mozambique, Madagascar, Kenya, and Tanzania between latitudes 4° S and 37° S, at depths of between 220 and 440 m. It can grow up to 35 cm in length.
The Izak catshark or simply Izak is a species of shark belonging to the family Pentanchidae, the deepwater catsharks. This species is common off the coasts of South Africa and southern Namibia. It typically inhabits the outer continental shelf at depths of 100–300 m (330–980 ft), with the males found deeper than the females and juveniles. The Izak catshark has a short, wide, flattened head and a robust body tapering to a long, slender tail. It can be identified by its ornate color pattern of dark brown spots or reticulations and blotches on a light yellowish background, as well as by the enlarged dermal denticles over its pectoral fins and along its dorsal midline from the snout to the second dorsal fin. This species reaches 69 cm (27 in) in length, with the males larger than females.
The crying Izak is a species of shark belonging to the family Pentanchidae, the deepwater catsharks. It is found in the western Indian Ocean off Mozambique and Tanzania, at depths of between 600 and 660 m. It can grow up to 38 cm (15 in)m in length.
The honeycomb Izak or Natal Izak is a species of shark belonging to the family Pentanchidae, the deepwater catsharks. This species is found in the Western Indian Ocean, near South Africa. It reaches a maximum length of around 50 cm. Since the mid-1970s, no specimens have been collected, even with recent biodiversity research cruises.
