odontodactylus-scyllarus

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MANTIS SHRIMP SIGHT

Even though the eye-catching mantis shrimp has 12 different color receptor cones (compared to humans’ three for red, blue, and green), it may be worse at discerning colors.

The dark areas of the eye are called the pseudopupil, is created by the facets of the eye that are looking directly at you. You will notice that the mantis shrimp often has three separate pseudopopils in each eye looking at you, this gives them trinocular depth perception in each eye independently. You will also sometimes see the pseudopupils get very large. This is when the animal points the acute zone of the eye at you. The acute zone has much greater resolution than the rest of the eye, and is analogous to our fovea.

  • Gif 1 footage by Michael Bok
  • Gif 2: showing pseudopupils in the eyes of a male Odontodactylus scyllarus. The right eye is damaged by RoyLCaldwell
  • More: Nature
Peacock Mantis Shrimp

Odontodactylus scyllarus

Odontodactylus translates into tooth finger, while scyllarus means a type of crab.

Family: Odontodactylidae (Mantis Shrimp that can detect circular polarisation)

Fun Fact:Mantis shrimp aren’t actually shrimp, but their own order. They repeatably smash their prey with their club like appendages that punch at a similar acceleration of a .22 caliber handgun. They’ve been known to break aquarium glass.

Habitat:They are endemic to Indo-Pacific reefs from Guam to East Africa.

Ecosystem Role: They help control crustacean populations.

Peacock Mantis Shrimp by tbanny Odontodactylus scyllarus, known as the peacock mantis shrimp, harlequin mantis shrimp, painted mantis shrimp, or clown mantis shrimp, is a large mantis shrimp native to the Indo-Pacific from Guam to East Africa. Their ability to see circularly polarised light has led to studies to determine if the mechanisms by which their eyes operate can be replicated for use in reading CDs and similar optical information-storage devices. [Wikipedia]

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National Aquarium in Baltimore - 7/20 

Animals pictured are:

  • Odontodactylus scyllarus - Peacock Mantis Shrimp
  • Sebastes miniatus - Vermillion Rockfish 
  • Amphiprion ocellaris - Ocellaris Clownfish

Do not remove commentary or credit. Photos may not be reposted or used in any form without explicit permission.

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モンハナシャコ
学名:Odontodactylus scyllarus
分類:シャコ目 ハナシャコ科
分布:東南アジア、ミクロネシア、インド洋、台湾の海域。日本では相模湾以南。

[memo(アクア・トトの解説より引用)]
モンハナシャコはエサとなるヤドカリやカニの仲間、貝類などを、捕脚(エビやカニのハサミ脚に相当する部分)を使って一撃で打ち砕いて食べます。そのため、捕脚の関節が硬く球状になっています。この捕脚の打撃力は凄まじく、自然界では大型のホラガイも一撃で割ってしまうほどです。


アクア・トトぎふ 1F マンスリー水槽 2012年7月『トトリンピック開催!』

youtube

Odontodactylus scyllarus [mantis shrimp] eye movements

Some video showing the independent scanning eye movements of the mantis shrimp, Odontodactylus scyllarus. The dark areas of the eye are called the pseudopupil. The pseudopupil is created by the facets of the eye that are looking directly at you. You will notice that the mantis shrimp often has three separate pseudopopils in each eye looking at you, this gives them trinocular depth perception in each eye independently. You will also sometimes see the pseudopupils get very large. This is when the animal points the acute zone of the eye at you. The acute zone has much greater resolution than the rest of the eye, and is analogous to our fovea.