Tyranna

## Tyranna natare (Tyranna)

This species has improved its movement, through muscles and a change in body shape, so much so that it can now swim. This means it can reach the untouched supply of microbes well above the sea-bed. At the back of the animal, the anus moved to point downwards and the end tapered into a sort of point and tail. Paired with its new muscles this allows it to wriggle back and forth to swim. This tail makes it look somewhat like an eel.
Features: A pair of longitudinal muscles, known as the axochord, have evolved along this proto-worm. They are slightly stiffer than its other muscles and provide a place of muscle attachment.

Distribution: Deep Ocean, Mid Ocean

Time: Developorian to Medusan Stage of the Atroxian (R.3 - R.5)

Size: 1.8cm (length)

Lifestyle: Filter-feeder

Predecessor: Superstes signum

Past Mutations:
Muscles
Electroreceptors
Open Circulatory System

Cause of Extinction: Outcompeted

Discovered by: ImmortalDragon

## Tyranna comedenti (Tyranna)

Having lost the ability of sight, this species now relies on its electroreceptors to find food. Luckily, the open ocean is currently sparsely populated, so there is plenty of food for now. It could also eat multicellular organisms, but there is none it can eat in its area. It supplements its diet with moss left by Oduntus rursus.
Features: This species has picked up bacteria, which are able to break out the energy of multicellular food in its stomach chamber. It has also developed a gizzard, which grinds the food down to manageable size for the microbes.

Distribution: Deep Ocean , Mid Ocean

Time: Developorian to the Medusan Stage of the Atroxian (R.4 - R.5)

Size: 2.0cm (length)

Lifestyle: Filter-feeder

Predecessor: Tyranna natare

Past Mutations:
Muscles
Electroreceptors
Open Circulatory System
Tail
Axochord

Cause of Extinction: Outcompeted

Discovered by: ImmortalDragon

## Tyranna musculi

A very common species, the best of the three Tyranna species that patrol the open ocean. Not only is it quicker than the other two, it is also more energy-efficient.

Features: Three gills on either side of the animal increase its surface area, and therefore more oxygen can diffuse into the circulatory system. This then gets delivered around the body, leading to more energy for the animal. Furthermore, the muscles have been rearranged in such a way in the body, so as to make movement more efficient.

Distribution: Deep Ocean, Mid Ocean

Time: Developorian to Cartiligian Stage of the Atroxian (R.4 - R.13)

Size: 2.1cm (length)

Lifestyle: Filter-feeder

Predecessor: Tyranna natare

Past Mutations:
Muscles
Electroreceptors
Open Circulatory System
Tail
Axochord

Cause of Extinction: Outcompeted

Discovered by: Soundwave

## Tyranna caultrifaucius NG13

This species has plenty of room and food in its habitat and so it does well by that account. The only problem is that they often find themselves as a snack for the Regemsitula. On the other hand, these predations do not threaten the stability of this population.

Features: This species has evolved calcified masses of dentine teeth, although they are located inside the throat of the species. They cannot be used for any external purpose but they would have slice up tougher food. It also has four gills on each side of its body that increase its surface area and get more oxygen pumping through the open circulatory system.
Distribution: Deep Ocean, Mid Ocean

Time: Medusan to Cartiligian Stage of the Atroxian (R.5 - R.11)

Size: 2.3cm (length)

Lifestyle: Filter-feeder

Predecessor: Tyranna comedenti

Past Mutations:
Muscles, Electroreceptors, Open Circulatory System, Tail, Axochord, Digestive System (Intestinal Bacteria & gizzard)

Cause of Extinction: Outcompeted

Discovered by: ImmortalDragon