Home > Mastigoteuthidae

1 Description

Most mastigoteuthids are rather small, from 3–15 centimetres total mantle length. Their most distinctive features are their extremely elongate tentacles—which retract into membranous lateral sheaths of the fourth (and largest) arms—and their very large ovate fins, which may occupy up to 80% of the mantle length in some species. Unlike most other squid, the club of the mastigoteuthid tentacle is not significantly (usually not at all) broader than the rest of the tentalce and is covered in very small suckers—in some species, invisible to the naked eye—which impart an extremely sticky property to the clubs, themselves answering for 70% or more of the tentacle's length in some species.

Many species also possess photophores ( bioluminescent organs) which may be located on either the body, the tentacular clubs, the ventral surface of the eye, or the eyelid. These photophores have a "lens" of chromatophores, pigment cells which may allow the squid to modify the colour of the light produced by the photophores. The mantle of some species is adorned with conical or hemispherical tubercles. The arm suckers possess sharp or blunt conical teeth, which are either larger or present only on the distal side. Coloration is typically a rich reddish brown.

Two species ( Idioteuthis tyroi and I. cordiformis ) are known to have greatly expanded tentacular clubs as paralarva and subadults.

2 Behaviour

Members of this family have scarcely been observed in life, but at least two species ( Idioteuthis hjorti and Mastigoteuthis magna ) are known to hover above the ocean bottom in a vertical orientation, the head pointing downward. The squid use their large fins to maintain this orientation and use both their extended tentacles as a pair of snares, held rigidly at a constant distance apart: this has been termed the "tuning fork" position. Prey items apparently consist primarily of benthic crustaceanCrustaceans Hyalella azteca Scientific classification Kingdom: Animalia Phylum: Arthropoda Subphylum Crustacea Classes Remipedia Cephalocarida Branchiopoda Ostracoda Maxillopoda Malacostraca The crustaceans (Crustacea) are a large group of arthropods (55,s.

Although mastigoteuthids possess inkAn ink is a liquid containing various pigments and/or dyes used for colouring a surface to render an image or text. Common perceptions consider ink for use in drawing or writing with a pen or brush. However, inks are used most extensively in printing. sacs (which would suggest forays into shallower, lit waters), all observations have been over the bottom in deep water. The squid seem to lack the ability of rapid jet propulsion and instead rely on their capable fins.