How to Train Your Dragon Wiki
How to Train Your Dragon Wiki

I know a few things about Sea Gronckles. They're known to be very slow swimmers and eaters. They scoop up a bunch of fish in their mouth and then swallow then bit by bit over several days. [src]

The Sea Gronckle is a large dragon that first appeared in Dragons: Rescue Riders.

Physical Appearance

Hatchling to Adult

Sea Gronckles are large whale-like dragons. They have a round body and a small flat snout with two large nostrils. Similar to dolphins or sharks, Sea Gronckles have a fin on their back, which helps them swimming, as well as a large nostril on top of their heads, which is directly connected to their mouths. Despite their size, Sea Gronckles have extremely small eyes, slightly bigger than a human's.



Sea Gronckles are described as being aquatic in nature, suggesting that the species is a strong swimmer.

Water Blasts

Sea Gronckles can use their large nostril to send blasts of water above them or right in front of them.

Speed and Agility

Despite being slow on land, Sea Gronckles have a swift tongue being able to scoop up mounts of fish in seconds.


Sea Gronckles have very small eyes compared to their body, which results in them having a limited view of their surroundings. This makes the dragons vulnerable to close range attacks.

Behaviour and Personality

Sea Gronckles are slow swimmers and eaters. They store their food in their mouths and swallow them bit by bit over several days.


Dragons: Rescue Riders

Season 1

While the Rescue Riders are attempting to identify a trio of rescued dragon eggs in the episode "Slobber Power", Leyla proposes a Sea Gronckle as a possible identification for a flightless dragon that might imprint to her (a human), but this is quickly dismissed by Summer, as she can still teach them swimming, if not flight.

Season 2

Main article: Gludge

In "Belly Flop", a Sea Gronckle named Gludge inadvertently swallows Elbone and eventually Summer, but he eventually spits them out after tasting Dak’s Seven Spice Seafood Surprise.


  • The Sea Gronckle has some anatomical mistakes by having nostrils and blowhole at the same time. In fact, blowholes are modified nostrils.

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