Omprellia

## Omprellia piezinphagen

Latest Mutations: Lose cirri

This alien shellfish has a unique feeding method. It has inverted the umbrella-shaped lobe that it's ancestors once used for transportation - which it has no need for now being a bivalve - into a cup-shaped device that can be protruded from the shell. The cup moves in such a way to create a pressure inside it, drawing water and food in, like a jellyfish can do with its bell. When threatened, it can withdraw the soft lobe completely inside the shell.

Status: Unlisted

Habitat: Tropical Ocean

Niche: Sessile Filter-Feeder

Diet: Any particle of marine snow meat or organism 0.5mm big or smaller.

Size: 2.3cm (length - shell front to back)

Nutritional Need: 122  x 2.3/100 = 2.8NP.

Food / Oxygen Requirement: 2.8 x 0.25 = 0.7NP per round (Needs to intake 0.7/0.6 = 1.2NP per round)/ 1.8 x 0.9 = 2.5NP

Abilities: Anti-Freeze. Exothermic. Inflexible. Liquid Excretion. Osmoregulation (Brackish Salinity). Permeable Skin. Small-Body Circulation. Solid Excretion. Subzero Metabolism.

Perception: Chemoreception 2 (detects chemicals 5m from mouth). Light Sensing (other side).

Stats: Buoyancy 0. Clam Strength 1. Coordination 2. Desiccation Resistance 1. Digestion 1 (100% Meat, Digests 60%). Filtration 2. Immunity 2.  Respiration 2 (10% off, Cutaneous Respiration, Stationary Respiration). Stamina 3. Strength 1. Support 1. Swim Agility -1. Swim Speed -0.5. Swim Stability 2. Toughness 3. UV Resistance 2. Walk Speed -0.5.

Intelligence / Behaviour: 1. Hungry > Wait for food. 2. Food > Stick cirri out of shell and filter. 3. Tired > Rest. 4. Pain > Close shell. 5. Maturity + Early Spring Full Moon > Release gametes.

External Features: The cylindrical body has skin with yellow irridiphore pigmentation. It is enclosed in an aragonite, horizontal, symmetrical bivalve shell. At the front is an inverted jelly-filled lobe, followed by the circular mouth and chemoreceptors. It has six pairs of gill slits. Along the body are four membranes with lines of cilia on them. On the dorsal side of the body is an eyespot.

Internal Features: Each cell contains lysozymes and piezolytes. The body has a hemacoel and a few small blood vessels from the gills and saccate metanephridium. The blood is violet because it contains hemerythrin. Anti-freeze threitol sugar alcohol flows around the body. It has a sex appropriate gonad. It has muscles across the body. It has a monogastric digestive system. From the ganglia in head is a single, ventral nerve cord with nerves running off. The nerve cord is shielded by the notochord.

Reproduction: Sexual Reproduction. External Fertilisation. 1,000 eggs per spawning.

Castes/Phases: Larval Phase until 10% developed. Larval C: have a jelly-filled dome, a pinhole eye and no jelly-filled lobe or bivalve shell. (Changes - +8NP, -1 Filtration, +Suspension, +1 Sight, -3 Toughness, -1 Clam Strength, -1 Desiccation Resistance, -1 Support, +1 Buoyancy, +1 Swim Speed, +1 Swim Agility, +1 Walk Speed. Hungry > Search for food. Pain > Row away. Active).

Locomotion: Sessile (0NP).

External Features: Skin (3NP, +1 Immunity, +1 Respiration, +1 Stamina, +Stationary Respiration, +Cutaneous Respiration, +Permeable Skin). Medium Pigmentation (2NP, +2 UV Resistance). Cylindrical (0NP). Bivalve Shell (14NP, +3 Toughness, +1 Clam Strength, +1 Desiccation Resistance, +1 Support, -1 Buoyancy, -1 Swim Speed, -1 Swim Agility, -1 Walk Speed, , +Inflexible, -Wriggling). Mouth (0NP, +1 Filtration). Chemoreceptors (2NP, +2 Chemoreception).  Membranes (2NP, +2 Swim Stability). Eyespot (3NP, +Light Sensing). Jelly-filled Lobe (3NP, +1 Swim Speed, +1 Filtration).

Internal Features: Piezolytes (5NP, +Low Pressure Tolerance). Lysozymes (1NP, +Subzero Metabolism). Gills (4NP, +1 Respiration, +1 Stamina, +Ram Ventilation, +Only Works Underwater). Open Circulatory System (3NP, +Small-Body Circulation, +1 Stamina). Anti-Freeze Compound (2NP, +Anti-Freeze). Large Nephridium (19NP, +Liquid Excretion, +Osmoregulation). Muscular System (7NP, +1 Strength, +0.5 Walk Speed, +0.5 Swim Speed, +Wriggling). Monogastric Digestive System (18NP, +1 Meat Digestion, +1 Veg Protein Digestion, +1 Immunity, +Solid Excretion). Centralised Nervous System (20NP, +2 Coordination, +Stimulus Response, +Subconscious Functions, +Body Movement Control). Gonads (14NP, +Sexual Reproduction, +Hermaphroditism, +External Fertilzation).

Temporal Range: R. 239 - Present (Atrobocean Stage of the Oliverian)

Distribution: Cosmopolitan

Lifespan: 1 year

Predecessor: Bitascyphus flavus

Classification: Cilistominae (sf), Cilistomidae (f)

Discoverer: StealthStyle