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

Summer is a Fastfin and is one of the few species of dragon with no natural eel phobia. [src]

The Fastfin is a medium-sized Tidal Class dragon that first appeared in Dragons: Rescue Riders.

Physical Appearance

Hatchling to Adult

Fastfins are a four-legged, medium-sized species of dragon. It has a long neck, thin body, and an eel-like tail, which makes it perfectly adapted for an underwater environment. It has a crown of triangular-shaped spikes on its head and small peg-like teeth.

The dragon has webbed feet, which helps it while swimming, but lacks claws. It has bigger front legs that back legs and a long, thin tail. It has two relatively small wings, which are better suited for swimming than flying.


WTS - Summer blasting water at Burple.jpg

Water Breath

Fastfins are capable of breathing streams of water. The water streams are powerful enough to push a heavy dragon like Burple a few meters away, or push a sheep up a cliff, blast a tree away when being tossed by a Silver-tailed Ironclaw. The blasts are also very accurate, as seen in "The Nest". Similar to a Scauldron, Fastfins are implied to store this water in their stomachs or other digestive system organ, as Summer indicates she will need to have a 'liquid breakfast' (as opposed to fish) to help fight a fire in "Where There's Smoke".

In their fire power description, Fastfins do not have a fixed shot limit as they can simply drink more water to gain more shots implying that as long as they stay near a water source they can have an unlimited shots.

When Fastfins are in areas with freezing temperatures, their water blast turn into ice and with enough practice they can use it to make walls of ice, slides, ramps and freeze a dragon in ice.

Their water is also known to be drinkable as shown by Leyla. And yet, the only to few types of firepower that work underwater.


Being a water dragon, Fastfins can stay underwater for long periods of time. According to Summer's description, she is also very fast. While Swiftwings are said to be the fastest dragon in the air, Fastfins are the fastest in the water.


As a water dragon, Fastfins are excellent swimmer and can remain underwater for extended periods. Despite that they can also spend an unknown amount of time on land without suffering ill effects in the case with Summer which means that they can adapt easily on land and in the water like a Thunderdrum as confirmed by Leyla in "Dragon Out of Water".

Immunity to Eels

Summer having caught the eel with Leyla's bag.jpg

Unlike most dragon species, Fastfins are one of the few specimens who don't have a fear of eels. Summer is one of the few exceptions, as she was attacked by one at a young age. It's unknown if Fastfins actually eat eels or if they do what kind of effects it has on them.

Immunity to Slinkwing Slime

Slinkwing slime doesn't stick to the scales of Fastfins, which Leyla suggested it is due to the dragons being aquatic. Fastfins are also able to wash away fresh Slinkwing slime with their water blasts, but once the slime has set and hardened, their water breath is ineffective.


Fastfins are very intelligent dragons, as seen with Summer, who is able to analyze natural phenomenons, such as wind currents, and come up with elaborate plans and ideas. They are capable of learning to adapt as seen with Summer in Huttsgalor Holiday as she tried to make use of her new ice blast.

Prehensile Tail

Fastfins have prehensile tails. Their tails are also very powerful, as Summer uses hers to play Volley Rock.

Endurance and Stamina

Fastfins can use their wings to block fire blasts from other dragons. When in flight, Summer flew between Huttsgalor and Hazard Island without showing any signs of exhaustion seen in Huttsgalor Holiday, suggesting that Fastfins have high stamina `


As seen with Summer, Fastfins are really strong especially with their heads, being able to lift a Rockspitter with ease and push a ship as seen in Hunt for the Golden Dragon. She was also able to carry three sheep while having the added weight of a rider on her back and hold a full grown eel in her mouth without much struggle.


Fastfins like Summer can emit high-pitched sound-waves that enables them to "see" in places with low visibility, very similar to a bat's echolocation. To maximize the extent of the ability, Fastfins keep their eyes closed.



Like other dragons, Fastfins are susceptible to the contagious Dreaded Dragon Flu.

Cold Weather

As mentioned by Summer in Huttsgalor Holiday, Fastfins can't fly in cold weather for long.

Limited Water Sources

If Fastfins run out of water or kept away from water sources then, they'll be vulnerable.

Behavior and Personality

Summer states that Fastfins do not get scared easily. As seen by Summer in Huttsgalor Holiday, she was surprised and shocked to find Huttsgalor covered in snow even more so when her water blast turned into ice suggesting they prefer to live in warm and sunny areas rather than cold and snowy areas.

Before joining the Rescue Riders, Summer also mentions when she was young about being bitten by an eel while with her friends suggesting that Fastfins are social dragons especially with their own kind and stick together in groups or pods.


Dragons: Rescue Riders

Season 1

Main article: Summer

Leyla, a human child who was raised by a dragon mother, once fell into the ocean. She was saved by a young Fastfin named Summer, and the two began a conversation about tides shortly afterwards. Because of this, the girls discovered that they have a lot in common, which led them to become best friends. Along with Dak, Leyla's twin brother, and three other dragons, Winger, Cutter, and Burple, they formed the group known as the Rescue Riders. They spend their days helping both dragons and humans alike from the town of Huttsgalor.


Site Navigation