Maximum length: 3 - 7 mm

The body is cream-colored, has white spots and is transparent.

They have white rhinophores with black tips,

a white head and a dark stripe in front of the rhinophores.

Photos 1 - 2 Johnny: Bangka Island North Sulawesi

Maximum length: 4 - 7 mm

The color varies from green to gray.

Their rhinophores always have black tips.

Photos 1 - 2 Johnny: Bangka Island North Sulawesi

 Maximum length: ?

It is certainly a Costasiella, but an as yet unnamed one,

so I can't give a size, this one had max 5 mm.

It has white rhinophores with black tips.

Photos 1 - 3 Johnny: Bangka Island North - Sulawesi

 Maximum length: ?

This Costasiella is still undescribed, there are still many to be discovered and named.

Photo 1 Johnny: Bangka Island North Sulawesi

 Maximum length: 15 mm

Orange with a series of black and white lines on the head and the rest of the body.

Photos 1 - 4 Johnny: Bangka Island North - Sulawesi

 Maximum length: ? This one had max. 8 mm

It is certainly a Cyerce, but an as yet unnamed one, so I can't give a size,

this one had max 10 mm.

Photos 1 - 2 Johnny: Bangka Island North - Sulawesi 

 Maximum length: 20 mm

Greenish with pink markings on the side.

The rhinophores with yellowish rings.

Photos 1 - 2 Johnny: Bangka Island Indonesia

Maximum length: 50 mm

Variable colors, but always with black spots on the body and an orange border.

Photos 1 - 2 Johnny: Bangka Island North Sulawesi

 Maximum length: 60 mm

Due to the chloroplasts of the algae they eat,

they are bright green under the folded side lobes. 

The coloration under the lateral lobes varies depending on what they eat.

Photo 1 Astrid: Moalboal Philippines

Photo 2 Johnny: Moalboal Philippines

 Maximum length: 40 mm

Same description as: see one species above.

Photo 1 Astrid: Moalboal Philippines

Photos 2 - 4 Johnny: Moalboal Philippines

 Maximum length: 8 mm

Unfortunately the pictures are not good.

It belongs to the species Stiliger but is unfortunately not yet described.

Photos 1- 2 Johnny: Banga Island North Sulawesi

 Maximum length: 22 mm

This species has a greenish ground color with white and yellow spots.

The rhinophores are white with black and white tips.

It is the only one of this genus with scattered yellow spots.

Photos 1 - 2 Johnny: Bangka Island North Sulawesi

 Maximum length: 25 mm

Greenish black body with white or cream-colored lines.

Rhinophores like the body with variable tips.

Photos 1 - 2 Johnny: Bangka Island North Sulawesi

 Maximum length: 30 mm

The body is bright light blue, the mantle has an orange border,

a dorsal stripe of the same color runs across the body.

The rhinophores are blue below and fade into an orange tone over a black bridge.

Photos 1 - 3 Johnny: Lembeh Strait North - Sulawesi