A group of mammals having long canines.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a group of mammals characterized by having long canines.

2. **Identifying Key Characteristics**: Long canines are typically associated with animals that have a diet primarily consisting of meat. These teeth are adapted for tearing and ripping flesh.

3. **Defining the Group**: The group of mammals that possess long canines and primarily eat meat is known as "carnivores."

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