Okay, here are a few descriptions for the WordPress post_tag “魚類” (Yú Lèi – Fish) in Traditional Chinese, tailored for different purposes:

**Option 1: Concise & Informative**

* **Description: 關於魚類生物的資訊，包含種類、生態、生活習性等相關知識。** (Guān Yú yú lèi shēngwù de zīxùn, bāohán zhǒnglèi, shēngtài, shēnghuó xíxìng děng xiāngguān zhīshì.)
* *Translation:* Information about fish biology, including types, ecology, and related knowledge of their life habits.
* *Suitable for:* A straightforward, general tag.

**Option 2: Adding Context & Appeal**

* **Description: 探索水下世界的奧秘，認識多樣化的魚類。從常見的淡水魚到神秘的深海魚，一起來發掘魚類世界的精彩！** (Tànsuǒ shuǐ xià shìjiè de àomì, rènshí duōyànghuà de yú lèi. Cóng chángjiàn de dànshuǐ yú dào shénmì de shēnhǎi yú, yīqǐ lái fājué yú lèi shìjiè de jīngcǎi!)
* *Translation:* Explore the mysteries of the underwater world and get to know the diverse world of fish. From common freshwater fish to mysterious deep-sea fish, let’s discover the wonders of the fish world together!
* *Suitable for:* A blog or website that focuses on exploration, discovery, and appealing to a wider audience.

**Option 3: Focusing on a Specific Topic (e.g., Aquarium/Fishing)**

* **Description: 分享觀賞魚、釣魚心得，以及魚類飼養、水族知識。無論你是水族愛好者還是釣客，這裡都有讓你感興趣的內容。** (Fēnxiǎng guānshǎng yú, diàoyú xīndé, yǐjí yú lèi sìyǎng, shuǐzú zhīshì. Wúlùn nǐ shì shuǐzú àihǎo zhě háishì diàokè, zhèlǐ dōu yǒu ràng nǐ gǎnxìngqù de nèiróng.)
* *Translation:* Sharing information about ornamental fish, fishing experiences, and knowledge on fish care and aquariums. Whether you’re an aquarium enthusiast or an angler, there’s content here that will interest you.
* *Suitable for:* A blog or website specifically concerning the aquariums or fishing.

**Option 4: Simple and Technical**

* **Description: 本標籤涵蓋所有關於魚類的 WordPress 文章。** (Běn biāoqiān hánggài suǒyǒu guānyú yú lèi de WordPress wénzhāng.)
* *Translation:* This tag covers all WordPress posts about fish.
* *Suitable for:* A very basic and technical description if the audience is already familiar with the topic.

**Choosing the Best Option:**

Consider the following when choosing:

* **Target Audience:** Who are you writing for? Are they experts or beginners?
* **Blog’s Theme:** What is the overall focus of your blog or website?
* **Content Covered:** Does your blog have many different articles about fish, or just a niche focus?

I would recommend the **Option 2** or **Option 3**, depending on your blog’s theme and target audience.