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Jellyfish are slow swimmers, and most species form part of the plankton. Traditionally jellyfish have been viewed as trophic dead ends, minor players in the marine food web, gelatinous organisms with a body plan largely based on water that offers little nutritional value or interest for other organisms apart from a few specialised predators such as the ocean sunfish and the leatherback sea turtle.
The Lisbon Oceanarium in Portugal has ocean sunfish showcased in the main tank, [57] and sunfish are also on display at the Denmark Nordsøen Oceanarium. [58] In Kamogawa Sea World the ocean sunfish named Kukey, who started captivity in 1982, set a world record for captivity for 2,993 days, living for eight years. Kukey was 72 cm (2.36 ft) at ...
Increased abundance of jellyfish negatively impacts fish populations in the same region because jellyfish feed on fish eggs and larvae. [13] Jellyfish and larval fish can also share common dietary preferences. Competition for food resources can result in depleted fish populations. Overpopulation of jellyfish is a concern to humans for many ...
Traditionally jellyfish have been viewed as trophic dead ends, minor players in the marine food web, gelatinous organisms with a body plan largely based on water that offers little nutritional value or interest for other organisms apart from a few specialised predators such as the ocean sunfish and the leatherback sea turtle. [68] [69]
The giant sunfish or bumphead sunfish (Mola alexandrini), [3] (also known as the Ramsay's sunfish, southern sunfish, southern ocean sunfish, short sunfish or bump-head sunfish in various parts of the world), [4] is a fish belonging to the family Molidae. It is closely related to the more widely known Mola mola, and is found in the Southern ...
The hoodwinker sunfish is a congener of (in the same genus as) the more widely known ocean sunfish, Mola mola. Mola tecta, like other Mola species, has a flat, almost symmetrical oval shape. It has a smooth body shape, no bump and has a maximum length of 242 cm (about 7.9 feet). [5] It does not have spines in its fins nor real caudal fin (tail ...
The huge ocean sunfish, a true resident of the ocean epipelagic zone, sometimes drifts with the current, eating jellyfish. The giant whale shark , another resident of the ocean epipelagic zone, filter feeds on plankton , and periodically dives deep into the mesopelagic zone.
Pelagic eggs rely on the ocean currents to disperse and receive no parental care. When they hatch, the larvae are planktonic and unable to swim. They have a yolk sac attached to them which provides nutrients. Most freshwater species produce demersal eggs which are thick, pigmented, relatively heavy and able to stick to substrates.