Folklore Regarding a Snake-like Creature

Lung, dragon, naga, zmei... There's a number of folklores regarding creatures that look like a lizard or a snake around the world. Although they all sound like very similar creatures, beliefs about them drastically vary by cultural region.
I need you to investigate such creatures this time.

Type	Folklores
Difficulty	⭐⭐⭐⭐⭐⭐⭐
Required Skill	Theology 7
How to get Quest	Read Theology book at Archives in Calicut, Hangzhou or Istanbul
Source	Sagres Henrique
Gold Reward	473,566 Đ
Gold Advance	40,000 Đ

Details

1-2. Sagres

Henrique

3. Sagres

Seafarer

4-5. Calicut

Scholar

6. Hangzhou

Scholar

7. Sakai

Seafarer

8. Sakai

Maiden

Japanese Archipelago Southeast Coast

Gil - Close to Upturned Boulder at the center of the map

Discovery

Ryujin

Note

• You need to have the port permits required to access each location above.
• If you are unsure of the location of the next NPC in town, order a drink in a Tavern in the same town.
• Folklores quest only: The required skills are only used to make the quest appear, not required to get the discovery.