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They dont just fold over its because they were caught in a net and the fins bends
It is theorized that when the orcas experience their growth spurt as juveniles they require both swimming and the force of the water to support the weight of the fin. The dorsal fin can weigh up to 200 pounds, thus, the water is required as a force against the weight to keep it upright. The fin is largely cartlidge. Additionally, orcas swim in the wild about 75 to 100 miles a day so it is believed that swimming strengthens the fin to stand upright. At least this is what I have read; I have to assume that all of the capitve orcas with collapsed fins either were born in captivity or were captured when juveniles.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoThere are a number of theories, mostly to do with the cartilage not forming properly in captivity. See this website for more information http://en.allexperts.com/q/Wild-Animals-705/Orca-Killer-Whales.htm
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Are female orcas larger than male orcas?
Male orcas have huge, triangular dorsal fins that can grow up to six feet in height. Females and younger orcas have smaller, curved dorsal fins. See the picutre in the link.
What does the dorsal fin on a whale do?
Orcas, also known as Killer Whales, have dorsal fins. Beluga whales do not.
Why do killer whales dorsal fins curve down?
A survey documented wild males orcas have fins bent. No one is exactly sure why the dorsal fins of killer whales bend, but it may have to do with genetics, injuries, or because the fins can be taller than many humans without any hard bones or muscles for support.
Why is cardboard good for bottle rocket fins?
Because it is light weight, and easy to fold into the fin shape.
How many orcas live in a pack?
Killer whales have been know to travel in groups of over 40 individuals.
How do fold Dwight's emergency Yoda?
1. Use one forth sheet of paper... fold side over... 2. Fold other side over 3. Fold a corner over to make ear 4. Fold other corner 5. Fold down Draw on face
How do you knead your bread?
You would fold , press, and turn it over, fold and press and over again.
Why do dolphins have a dorsal fin?
To maintain directional stability (steering) while moving through the water.
What are the types of fold mountains?
types of fold mountains are.1.symmetricla fold2.asymetrical fold3.over fold4.recumbent fold5.over thrust fold
How do you fold laundry?
For shirts you cross over the arms, the fold them vertically twice. For pants you fold the across horizontally then fold them in half vertically.
How do you fold a triangle into a pentagon?
Take a corner of the triangle and fold it over so that the corner is not over the rest of the triangle.
What is Fin Fold Theory?
It is the theory that paired fins arose in jawed fishes from the evolution of ventrolateral skin folds in jawless, basal fishes. The folds then separated and specialized to form the paired pectoral and pelvic fins in more evolved fishes.
