Marine Biology (Botany, Zoology, Ecology and Evolution)
10th Edition
ISBN: 9780078023064
Author: Peter Castro, Michael E. Huber Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 8, Problem 1CT
Hagfishes and lampreys are the only living representatives of a very ancient group. Why do you suppose there are still some of these jawless fishes around?
Expert Solution & Answer
Summary Introduction
To explain: The reason why there are still some of hagfishes and lampreys around.
Introduction: Jawless fishes are the most primitive fishes living today. They have cylindrical and elongated body like that of snakes or eels. Hagfishes and lampreys are jawless fishes. Hagfishes live in burrows, whereas lampreys are mostly found in temperate regions.
Explanation of Solution
There are still some of hagfishes and lampreys around due to the following reasons:
- Both hagfishes and lampreys are highly adopted species of the class Agnatha.
- Since both hagfishes and lampreys are living fossils, they are the most successful ones.
Some jawless fishes still survive as highly specialized forms, such as unusual predators and parasites. These specialized structures have not been outcompeted by other advanced fishes.
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Chapter 8 Solutions
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