asterinidae

2

“Blue Bat Star” (Patiria pectinifera)

…a species of asterinid sea star that occurs throughout the northern Pacific Ocean, along the coasts of Russia, China and Japan. P. pectinifera typically inhabits areas with coarse sediment and/or stony seabeds. Blue bat stars feed mainly on algae, detritus, sea grasses and occasionally small invertebrates.

Petiria pectinifera is commonly used as a model organism in developmental biology as they are easy to maintain and have large and transparent oocytes. Making them mainly used for studies of ooctye development.

Classification

Animalia-Echinodermata-Asteroidea-Valvatida-Leptognathina-Asterinindae-Patiria-P. pectinifera

Images: M.DOĞAN ÖZDEMIR ZAMAN

Bat Stars | ©Jordan Manley  (Burnaby Narrows, Haida Gwaii, North Coast of British Columbia, Canada)

Bat star, Patiria miniata (Valvatida - Asterinidae), Syn. Asterina miniata, is a species of sea star with varying coloration, most commonly reddish-orange or mottled white, but can be found in a variety of colors and patterns. They usually have five, sometimes four to nine, short, triangular arms. They have a radius of about four inches and have radial symmetry [1].

The Bat star is typically omnivorous feeding on a wide variety of plants and animals. Bat stars are common among rocks overgrown with surfgrass, larger algae, sponges, and bryozoans. It is also found in the low intertidal zone and the subtidal zone to 290 m.

This species occurs along the Pacific coast of North America, from Sitka, Alaska, to Baja California, and Islas de Revillagigedo, Mexico [2].

Patiria pectinifera / Itomaki Hitode

Patiria pectinifera

クラゲで有名な加茂水族館に行ってきました!
記念にイトマキヒトデの写真をUP!!!! I went to Kamo Aquarium which is famous for jellyfishes.
As a memory, a picture of the Blue bat star is uploaded!!!


Animalia Echinodermata Asteroidea Valvatida Asterinidae
動物界 棘皮動物門 ヒトデ綱 アカヒトデ目 イトマキヒトデ科

Kamo Aquarium, Yamagata, Japan.
加茂水族館@山形県鶴岡市

Aquilonastra conandae

…is a very small (< 2cm) species of Asterinid starfish which was first discovered at Reunion Island, and was then later identified across the Mascarene Islands. Aquilonastra conandae individuals often have around seven or eight arms, which are often irregular in length.  This is most likely due to regeneration.

Classification

Animalia-Echinodermata-Asteoidea-Valvatida-Asterinidae-Aquilonastra-A. conandae

Image: Nicole Gravier-Bonnet

2

New Zealand Common Cushion Star (Patiriella regularis)

…a species of asterinid sea star that is endemic to the coasts of New Zealand. However it was also introduced into waters of south east Tasmania. P. regularis is typically found in intertidal pools and likely feeds on detritus, algae, and small invertebrates.

Classification

Animalia-Echinodermata-Asteroidea-Valvatida-Asterinidae-Patirella-P. regularis

Images: kiwi_kid and Nuytsia@Tas

Parvulastra paravivipara

…is an extremely small species of sea star that occurs on off the coasts of the Eyre Peninsula in South Australia. P. paravivipara typically inhabits intertidal rock pools, usually those that have granite rocks. Parvulastra paravivipara is noted for its unusual life cycle, In which adults are self-fertilizing hermaphrodites and the eggs are brooded within the gonads. There is no planktonic stage and the developing young are cannibalistic and will feed on other embryos and juveniles inside the brood pouch. When they are mature enough they will be released into the water where they will live out their life, likely in the same pool they were born in.

Classification

Animalia-Echinodermata-Asteroidea-Valvatida-Asterinidae-Parvulastra-P. parvivipara

Image: Jennifer Viegas

Asterina anomala / カワリイトマキヒトデ

Asterina anomala

Asterina anomala
A very small starfish with about one centimeter in diameter.
The asterina anomala divides itself in two, then each piece grows up to a new individual.
For this reason, several arms are always smaller than the others. カワリイトマキヒトデ
直径1センチ程度の極小のヒトデ。
カワリイトマキヒトデは、自ら二つに分裂し、それぞれの切れ端が新しい個体に成長する。
このため、カワリイトマキヒトデは、数本の腕が大きくて残りの腕が成長中の奴ばっかりである。


Animalia Echinodermata Asteroidea Valvatida Asterinidae
動物界 棘皮動物門 ヒトデ綱 アカヒトデ目 イトマキヒトデ科

The photo taken at Toba Aquarium, Mie, Japan.

Patiria pectinifera / イトマキヒトデ

Patiria pectinifera

Even by going to the Kamogawa Seaworld, I am absorbed in taking a picture of Blue bat star. 鴨川シーワールドに行ってさえ、イトマキヒトデの撮影に余念はありません。


Animalia Echinodermata Asteroidea Valvatida Asterinidae
動物界 棘皮動物門 ヒトデ綱 アカヒトデ目 イトマキヒトデ科

Kamogawa Seaworld, Chiba, Japan.
鴨川シーワールド@千葉県鴨川市

Bat star

Asterina miniata

バットスター
アラスカからメキシコにかけて生息。 Bat star
It is distributed from Alaska to Mexico.


Animalia Echinodermata Asteroidea Valvatida Asterinidae
動物界 棘皮動物門 ヒトデ綱 アカヒトデ目 イトマキヒトデ科

Enoshima Aquarium, Kanagawa, Japan.
江ノ島水族館@神奈川県藤沢市

Patiria pectinifera / イトマキヒトデ

Patiria pectinifera

The clinging Blue bat star. くっついているイトマキヒトデ

Classification
Animalia Echinodermata Asteroidea Valvatida Asterinidae
動物界 棘皮動物門 ヒトデ綱 アカヒトデ目 イトマキヒトデ科

Photo taken at Toba Aquarium, Mie, Japan

Blue bat star / イトマキヒトデ

Patiria pectinifera

The cluster of Blue bat star. イトマキヒトデの群れ。

Classification
Animalia Echinodermata Asteroidea Valvatida Asterinidae
動物界 棘皮動物門 ヒトデ綱 アカヒトデ目 イトマキヒトデ科

Photo taken at Shimonoseki Aquarium “Kaikyokan”, Yamaguchi, Japan