Oar fish- Characters, Habitat, Feeding ,Threat ppt

Oarfish are large, greatly elongated, pelagic lampriform fish belonging to the small family Regalecidae. Found in all temperate to tropical oceans yet rarely seen, the oarfish family contains three species in two genera. One of these, the giant oarfish, is the longest bony fish alive, growing up to 8 m in length. Wikipedia
Class: Actinopterygii
Scientific name: Regalecidae
Phylum: Chordata
Higher classification: Lampriformes
Rank: Family
Kingdom: Animalia

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OAR FISH: CHARACTERISTICS, HABITAT, $
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family Regalecidae.

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Rare 17-foot-long oarfish found off Catalina Island
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•Oarfish,(Regalecusglesne)
•large, long, sinuousfish
•Family Regalecidae
•order Lampridiformes
•Found throughout the
tropics and subtropics in
rather deep water.

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Body
oar fish have a slender and flattened scale-less body,, covered by a silver guanine wrap, as well as an
outstanding, medium-sized mouth. In addition, they have some weird accessories that give them a
strange appearance, full of a unique beauty, within so many marine species.
Fin:
They have agood-sized dorsal fin, which begins at the top of the eyes and reaches the end of the tail.
This ispink or redand has aboutfour hundred thorns;twelve of them beingslightly
elongated,which gives rise to the formation of aprotruding and very striking red crest.
The pelvic fins as well as the dorsal ones have almost thesame
elements,and their shape resembles an oar and hence the origin
of the species name. The pectoral fins arevery small, almost
visible while the anal and caudal ones areextremely small,
almost absent.

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Oar fish
use their
dorsal
finfor
swiminga
nddo it
vertically.

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A ribbon-shaped fish, very thin from side to side, the oarfish may grow to a
length of about 9 metres(30.5 feet) and a weight of 300 kg (660 pounds).
It is shiny silver in colour, with long, red, oarlikepelvic fins and a long, red dorsal fin
that rises as a manelikecrest on top of the head.
Seldom seen at the surface, it is credited as the “sea serpent” of some reported
sightings.
They feed on krill or tiny plankton.
They lack scales. Instead their bodies are covered with little bumps called tubercules.
They are super shiny as their entire body is coated with a slivery like material called
guanine.
Many marine biologists claims that they are weak swimmers. They are often found
hanging vertically in the water with their heads pointing up.
Many historic tales describe them as sea monster but in reality they are toothless and
harmless

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8The Oar Fish’ Common Behavior

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Theycanbefoundinthedepthsswimming
verticallyalthoughtheycanalsoswim
horizontally,duetotheirfairlygood
locomotionsystemthatallowsthemtoperform
variousmaneuversofchangeofspeedand
direction..
These areshy and very calmfish that don’t like
to attract attention. When they are stalked by their
predators, oar fish tend toflee to the depthsand
take refugeamong the rocks

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Oar Fish: Habitat and Distribution
Oar fish inhabit the depthsabout 1000 meters.Thanks to
their ability to adapt their body temperature to abouttwenty
degrees Celsius,they can be foundin almost every oceanin
the world,except for polar areas.
They are usually amigratory fish,sothey don’t stay longin an area.
However, oar fish can be foundrelatively easily in tropical regions
of the temperate oceans.
They move to great distances of different waters to look forfood and
refugeand to flee from their predators beingable to navigate from
depths of20 meters to 1000 quickly

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What do Oar fish Feed On?
The Regalecidaefeed on plankton, squid, small fish and
crustaceans using their gills and the very well developed rakes
of their mouth, which are not observed with the naked eye, but
only when capturing their prey.
How do Oar Fish Catch their Prey?
Oar fish differ from sawfish becausethey lack teeth,so they
must use other means to catch their prey and feed. Everything
in these animals hasa raison d’être, since they don’t not have
teeth, but fortunately they are provided withmouth gills
spinesdesigned for such arake-like activity, which unfold
from their gills.Another advantage for catching prey is
theirvertical swimming way, which is quite useful.

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How Do Oar Fish Reproduce?
The spawning occurs betweenJuly and December, during which time they
lay alarger quantity of eggsaround2.5 millimeters in diameter.
Such eggs arethrown towards the surfacewhere theyremain
floatinguntil they reachthe time of hatching.

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Auto Amputation Skills
Oar fish have a very relevant characteristic, which is the capacity of self-amputation.
However, some doubts have not yet been clarified in this regard, despite the fact that many
media have given information about this event, stating that this fish bites its tail to amputate
it.
The latter is not very credible since they do not have teeth. What is more likely is that this
fish separates the final part of its body, (a fact that until now the reason is unknown), many
times throughout its existence.

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The Oar Fish andTsunamis
The appearance of these marine
creaturesbadly called sea
monsterstriggers ahorror
movie and bad omens,since it
is said that every time they are
observed anearthquake will
arrive.
A similar event occurred in2011
in Haiti and Chile, where a
huge sea snake appeared and
after two weeks, thedisastrous
tsunamioccurred onthe
Japanese coast.

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