“Jelly Fish” “Comb Jelly's”Kingdom: Animalia Kingdom: Animalia Phylum:Cnidairia Phylum:Ctenophora Classes: Anthozoa Classes: Tentaculata

Hydrozoa Nuda Scyphozoa BY: Alex Lingg and a little of Trevor Brown

Phylum CindariaJelly fishOver 10,000 living

speciesThree Distinct

Groups:Anthozoa (Corals and

sea anemones)Hydrozoa(Hydroids)Scyphozoa (true jelly

fish)True Jelly

Hydroid

Coral

True Jelly's Only about 100-150 species

known Only two different species:

- both considered comb jelly's

Major Characteristics: Cindaria distinguished by having cells that have

harpoon like or stinging tentacles that are used to eat and to lure prey

basement membranes musclesnervous systems some have sensory organs

Major Characteristics: Ctenophora distinguished from that they

have colloblasts, cells that capture prey by squirting glue on them

1 millimeter to 1.5 meters in size

Most species have “comb rows” which are bands of cilia overlapping around the body

Feeding: CindariaCan feed by: absorbing dissolved organic chemicals filtering food particles out of the water obtaining nutrients from algae within

their cellsSome depend almost completely on

absorbing dissolved nutrients

Feeding: CtenophoraAll are predatorsEat 10 times their body weightEat zooplanktonmollusk fish larvae

Reproduction: CnidariaCan reproduce

sexually and asexuallyThe adults have

gonads, which release ova and sperm into the water in the breeding season

Asexually they produce buds or split right down the middle

Reproduction: Ctenophora Ctenophora Almost all of the

species are hermaphrodites, which means they function as both male and female

Structure / Anatomy: Cnidaria two cell layersFirst is the ectoderm

which includes the epidermis, the nervous tissue

Second is endoderm which includes the gut and associated glands

Ctenophora two cell layers the outer layer of the

epidermis consists of: -sensory cells -secretion - protectionThe inner layer of the

epidermis contains a nerve net and muscles

Skeletal / Muscular: CnidariaThey have a mesoglea is the translucent, jelly-

like substance found between the two epithelial cell layers in the bodies of coelenterates

Mostly waterThe mesoglea has muscle bundles and nerve

fibersWater is used for boyancy

Structure / Anatomy:

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Structure / Anatomy:

Locomotion: Cinardia swim by a form of jet propulsion muscles squeeze water out of the cavity tissue layers are very thin, its hard to swim

against currents just enough to control movement within

currents

Locomotive: CtenophoraUse combs to swimThey can go in the reverse direction!When trying to escape predators, they can

accelerate to six times its normal speed

Nervous system and sensesCnidaria have no brains or even central nervous systems Instead they have nerve nets consisting of

sensory neurons that generate signals in response to various types of stimulus

Can sense tilt Most species have simple eyes Although the eyes probably do not form

images, they can distinguish the direction as well as navigate around solid-colored objects

Nervous system and scenses Ctenophorahas no brain or central nervous systembut instead have a nerve netThe largest single sensory feature is the aboral

organ Its main component is a statocyst which is a

balance sensor Has cilia which are balancers that sense its

orientation.

RegenerationCnidariaAll can regenerateThis means they can

recover from an injury

reproduce asexuallyThey gather small

pieces or even collections of separated cells

recover even after apparently being destroyed by predators

Ctenophora can’t

Feeding CnardiaWhen prey is

swallowed, it is liquefied by enzymes

Ctenophora

Once the food is in the digestive cavity, gland cells release enzymes that reduce the prey to slurry

RespirationCtenophoraThe resulting slurry is wafted through the canal

system by the beating of the ciliaThe ciliary rosettes in the canals may help to

transport nutrients to muscles in the stomachCnardiaThe slurry circulates through the digestive cavity,

through the connecting tunnelsthe circulation of nutrients is driven by water

currents or by muscular movements Nutrients reach the outer cell layer by diffusion

ExcretionCtenophoraThe anal pores

may eject unwanted small particles, but most unwanted matter is regurgitated via the mouth

CnardiaIndigestible remains

of prey are expelled through the mouth. The main waste product of cells' internal processes is removed by the external and internal water currents

Class: CubozoaBox jellyfishdistinguished by

being cube-shape known for the

extremely potent venom

the most venomous creatures in the world

tings from these are extremely painful and sometimes fatal to humans

Class: Hydrozoaare a taxonomic

class of very small, predatory animals

most living in saltwater

are related to jellyfish and corals

Class: ScyphozoansScyphozoans have no

durable hard parts, including no head, no skeleton and no specialized organs for respiration or excretion

consist of as much as 99% water and therefore are rarely found in fossil form

Class: TentaculataA class of comb

jelliescommon feature is a

pair of long, feathery, contractile tentacles

the tentacles are sticky-tipped cells that trap small prey

Class: Nuda

A class of comb jellies

They are distinguished from other comb jellies by the complete absence of tentacles, in both juvenile and adult stages