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Question: Based on the above information, why do you think the eyes of catfish are relatively small?

Organism of the Day: Catfish

Catfishes (order Siluriformes) are a diverse group of ray­finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior. Many of the larger species of catfish are farmed or fished for food, while many of the smaller species, particularly the genus Corydoras, are important in the aquarium hobby.

Catfish may have up to four pairs of barbels, although pairs of barbels may be absent, depending on the species. Their barbels are important in detecting food. The eyes on catfish are generally small.

Catfish have no scales; their bodies are often naked. In some species, the mucus­covered skin is used in cutaneous respiration, where the fish breathes through its skin. In some catfish, the skin is covered in bony plates called scutes; some form of body armor appears in various ways within the order.

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Biology1. Organism of the Day ­102. Schoolwires Web Survey ­15/Start Homework3. Evolution Video/Test Make Up ­554. 16.1 Notes5. Start Homework

AnnouncementsDue Today: Nothing:)

Due Monday: Read 16.1 and Answer Questions 1 ­ 3.

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Schoolwires Survey Activity

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Evolution Video/Test Make Up

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16.1 NotesDarwin's Voyage of Discovery

I. Charles Darwin

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16.1 NotesII. Darwin's Epic Journey

A. Evolution

B. HMS Beagle

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16.1 NotesIII. Observations Aboard the Beagle

A. Biological Diversity ­

B. Patterns of Diversity

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Turn­and­Talk

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16.1 Notesi.Species vary globally

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16.1 Notesii. Species vary locally

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16.1 Notesiii. Species vary over time

1. Fossils

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iv. Synthesis of Ideas

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16.1 Notes

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Exit Question:

Define evolution.

RemindersDue Monday: Read 16.1 and Answer Questions 1 ­ 3.