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  2. Sunflower sea star - Wikipedia

    en.wikipedia.org/wiki/Sunflower_sea_star

    Underside of a sunflower sea star. Sunflower sea stars can reach an arm span of 1 m (3.3 ft). They are the heaviest known sea star, weighing about 5 kg. [4] They are the second-biggest sea star in the world, second only to the little known deep water Midgardia xandaros, whose arm span is 134 cm (53 in) and whose body is 2.6 cm (roughly 1 inch) wide. [7]

  3. Starfish - Wikipedia

    en.wikipedia.org/wiki/Starfish

    Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (/ ˌ æ s t ə ˈ r ɔɪ d i ə /). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish are also known as asteroids due to being in the class

  4. Thromidia gigas - Wikipedia

    en.wikipedia.org/wiki/Thromidia_gigas

    Thromidia gigas is a species of starfish in the family Mithrodiidae. It was described by Ole Theodor Jensen Mortensen in 1935. [1] It lives in the Indian Ocean off the coast of eastern South Africa and southern Madagascar. [1] [2] This species is probably the largest echinoderm in terms of bulk, and may exceed 13 pounds (5.9 kg). [3]

  5. Thromidia catalai - Wikipedia

    en.wikipedia.org/wiki/Thromidia_catalai

    Thromidia catalai, sometimes called the heavy starfish, is a species of starfish in the family Mithrodiidae in the order Valvatida. It is native to the Indo-Pacific region. [ 2 ] Thromidia catalai is one of the largest and heaviest starfishes in the world.

  6. Crown-of-thorns starfish - Wikipedia

    en.wikipedia.org/wiki/Crown-of-thorns_starfish

    The crown-of-thorns starfish (frequently abbreviated to COTS), [1] Acanthaster planci, is a large starfish that preys upon hard, or stony, coral polyps (Scleractinia). The crown-of-thorns starfish receives its name from venomous thornlike spines that cover its upper surface, resembling the biblical crown of thorns. It is one of the largest ...

  7. Oreaster reticulatus - Wikipedia

    en.wikipedia.org/wiki/Oreaster_reticulatus

    Oreaster reticulatus, commonly known as the red cushion sea star or the West Indian sea star, is a species of marine invertebrate, a starfish in the family Oreasteridae. It is found in shallow water in the western Atlantic Ocean and the Caribbean Sea.

  8. Luidia superba - Wikipedia

    en.wikipedia.org/wiki/Luidia_superba

    Luidia superba is probably the largest five-armed starfish in the world. [2] The largest specimen from Tagus Cove in the Galapagos Islands had a radius, measured from the centre of the disc to the tip of the arms, of 41.5 centimetres (16.3 in).

  9. Pisaster brevispinus - Wikipedia

    en.wikipedia.org/wiki/Pisaster_brevispinus

    The pink sea star has five thick arms and a large central disc. It is one of the largest sea stars in the world. While typically having a diameter of 320 millimetres (13 in), monsters up to 90 centimetres (35 in) have been found. The largest animals may weigh 4.5 kilograms (9.9 lb). [2]