Showing posts with label Jellyfish. Show all posts
Showing posts with label Jellyfish. Show all posts

Wednesday, December 4, 2019

Ocelli


We just learned about the Rhopalium.

Another part of a jellyfish is the Ocelli.

In the parrs of the jellyfish's bell where it dents in called the rhopalium, sometimes a jellyfish will have eyes called the ocelli.

They are very simple and do not have a lot of parts like human eyes, but they can sense some darkness and light, and use that to swim toward or away from something.


(from: wikipedia - carybdeida)


Kid Facts - Blast from the past: Cephalopod Eyes

Wednesday, November 27, 2019

Rhopalium


We just learned about the Lappet.

Another part of a jellyfish is the Rhopalium.

Remember we learned about the lappet that goes the bell and dents in on some spots.
The part where the bell dents in toward the middle is called the Rhopalium.

In these rhopalium are things that jellyfish can use to sense light and movement.


(from: wikipedia - rhopalium)


Kid Facts - Blast from the past: Cephalopod Suckers

Wednesday, November 20, 2019

Lappet


We just learned about the Nerve Net that is like a jellyfish's brain.

Another part of a jellyfish is the Lappet.

The circle shaped bell of a jellyfish is sometimes split up into parts by a small indent on the outside of the bell.
This little part where the bell dips toward the middle helps the jellyfish bell be able to flex and pull in and out so the jellyfish can swim.

Each of the parts of the outside of the bell between the indents is called a lappet.


(from: wikipedia - aurelia aurita)


Kid Facts - Blast from the past: Cephalopod - Tentacle Hooks

Wednesday, November 13, 2019

Nerve Net


We just learned about the Jellyfish Stomach.

Another part of a jellyfish's body is the Nerve Net.

In humans, our nervous system is our brain which is in charge of the rest of our body, and then our spinal cord and nerves that sends messages back and forth to the brain.

In most jellyfish, they have a nerve net which is kind of like the nerves we have all over, but without the spinal cord or a brain.

The nerves are all hooked together, and if a jellyfish senses something near by the nerve net can send messages all over it's body for the whole jellyfish to swim or try to pull in it's oral arms.
But it doesn't really have any thinking to it, it is just a very quick and simple reaction to a feeling.

It's kind of like if you touch something really hot, your hand very quickly pulls away without really thinking about it.
But if you were like a jellyfish, then your hand would touch something hot but your whole body would pull away, arms, legs and all!


(from: wikipedia - nerve net)


Kid Facts - Blast from the past: Cephalopod - Arms and Tentacles

Wednesday, November 6, 2019

Jellyfish Stomach


We just learned about the Nematocysts.

Another part of a jellyfish is the Jellyfish Stomach.

We learned before about the oral arms that bring the food to the stomach, and the manubrium which is both the way a jellyfish eats and also gets rid of waste.

When a jellyfish gets food into it's stomach, it uses things called enzymes to slowly digest the food until it is all liquid, and then it sends it off to all the parts of the jellyfish's body.

After the good parts of the food are all used up by the jellyfish's body, the liquid is sent back to the jellyfish's stomach, and then pushed out of the manubrium so it is empty again.


(from: wikipedia - jellyfish)


Kid Facts - Blast from the past: Cuttlebone

Wednesday, October 30, 2019

Nematocysts


We just learned about the Tentacles of a jellyfish.

Another part of a jellyfish is the Nematocyst.

This is the part of the jellyfish that stings its prey, or even stings a person.

They are almost like traps on the jellyfish's tentacles that just wait until they get touched a tiny bit, and then they shoot out and then squirt toxins into their prey to stun them or kill them.


(from: wikipedia - cnidocyte)


Kid Facts - Blast from the past: Chromatophore

Wednesday, October 23, 2019

Tentacles


We just learned about the Oral Arms of a jellyfish.

Another part of a jellyfish is the Tentacles.

These are the arms that hang down from the edge of the big circular bell of the jellyfish.
The tentacles have stingers on them that help them catch prey, and then the oral arms help bring them up to their manubrium mouth.


(from: wikipedia - jellyfish)


Kid Facts - Blast from the past: Cephalopod Ink

Wednesday, October 16, 2019

Oral Arms


We just learned about the Manubrium mouth on a jellyfish.

Another part of a jellyfish's body is the Oral Arms.

We learned that the manubrium is the mouth.
The oral arms are connected to the manubrium, and they hang down below the jellyfish like tentacles.
When they sting an animal, the oral arms help bring the food up to their manubrium mouth so they can eat it.


(from: wikipedia - jellyfish)


Kid Facts - Blast from the past: Cephalopod Funnel

Wednesday, October 9, 2019

Manubrium


We just learned about the Gastrodermis that helps the jellyfish eat.

Another part of the jellyfish's body is the Manubrium.

This is a part that hangs down from the middle of the inside of the jellyfish.
They use it to eat, and also to get rid of waste.


(from: wikipedia - jellyfish)


Kid Facts - Blast from the past: Octopus Gills

Wednesday, October 2, 2019

Gastrodermis


We just learned about the jellyfish Mesoglea underneath the bell.

Another part of a jellyfish's body is the Gastrodermis.

This is the part below the mesoglea.
The gastrodermis helps the jellyfish digest the food that gets brought up to their mouth.


(from: wikipedia - gastrodermis)


Kid Facts - Blast from the past: Mantle

Wednesday, September 25, 2019

Mesoglea


We just learned about the Jellyfish - Epidermis.

Another part of the jellyfish body is the Mesoglea.

Underneath the bell part of the jellyfish is an open area that is made up of water and some other gooey stuff called collagen.
It's almost like a balloon full of jelly that helps the jellyfish keep it's shape in the water.


(from: wikipedia - mesoglea)


Kid Facts - Blast from the past: Octopus Beaks

Wednesday, September 18, 2019

Jellyfish Epidermis


We just learned about the Jellyfish Bell.

Another part of the jellyfish is the Epidermis.

The epidermis is the skin on the outside of the bell.
Just like humans, jellyfish have skin, and their epidermis has a bunch of nerves in it called a "nerve net".

This nerve net helps them feel movement in the water and tell their body where to try and swim to get food.


(from: wikipedia - jellyfish)


Kid Facts - Blast from the past: Japanese Flying Squid

Wednesday, September 11, 2019

Jellyfish Bell


We just learned about the long bubbly hydrozoan, the Marrus Orthocanna.

Let's learn a little bit about Jellyfish bodies.
The big part of the jellyfish that looks kind of like the head is called the Bell.


(from: wikipedia - jellyfish)


Kid Facts - Blast from the past: Opalescent Inshore Squid

Wednesday, September 4, 2019

Marrus Orthocanna


We just learned about the Green Hydra.

Another type of hydrozoan is the Marrus Orthocanna.

This animal looks like a long fiery string with bubbles on it.
It can grow to be several feet long, and forty inches wide.

These creatures live in very deep waters, over 600 feet deep and mostly in the Arctic Ocean.


(from: wikipedia - marrus orthocanna)


Kid Facts - Blast from the past: Big Blue Octopus

Wednesday, August 28, 2019

Green Hydra


We just learned about the String Jellyfish.

Another type of hydrozoan is a Green Hydra, also called the Hydra Viridissima.

These are skinny green animals with tentacles, that are very small, only about 10 milimeters.

They eat tiny little insects and crustaceans.

Green Hyrdras mostly do not swim around anywhere and usually just live on top of other things in the water like plants.

Their green color comes from a type of green algea that grows on their body.

They can flex their body a little to move around if they have to, but mostly they just stay on the plant they are attached to.


(from: wikipedia - hydra viridissima)


Giftige Tierwelt: faszinierende Lebewesen im Tümpel. Süßwasserpolyp, Hydra viridissima - nature tv Lothar Lenz

Kid Facts - Blast from the past: Pharaoh Cuttlefish

Wednesday, August 21, 2019

String Jellyfish


We just learned about the Freshwater Jellyfish.

Another type of animal is the String Jellyfish, also called the Barbed Wire Jellyfish, Long Stringy Stingy Thingy, and Apolemia Uvaria.

Just like some other animals, this looks like a jellyfish but it's actually a hydrozoan.

One String Jellyfish is really a whole bunch of little ones all attached together.

This animal can get up to about 10 feet long, and 2 inches wide.
They live like one big long string with pink and white tentacles.
The tentacles are all different animals stuck together on the one big long string in the middle.

These tentacles do have a painful sting but will not kill a person.



(from: wikipedia - apolemia uvaria)


Apolemia uvaria - Gaméou (La Ciotat) - AEGYPT0S

Kid Facts - Blast from the past: Humboldt Squid

Wednesday, August 14, 2019

Freshwater Jellyfish


We just learned about the Creeping Comb Jelly.

Another type of jellyfish is the Freshwater Jellyfish, also called the Craspedcusta Sowerbii.

Just like the name says, this jellyfish lives in freshwater, not in saltwater like the oceans.

It comes from China, but it has been found pretty much everywhere in the world, from North America to Australia.

It grows to about one inch wide, and has tiny little tentacles that have stingers to catch its prey, but the stingers aren't strong enough for a human to even feel the sting.


(from: wikipedia - craspedcusta sowerbii)


Freshwater Jellyfish - The Jellyfish Warehouse

Kid Facts - Blast from the past: Southern Sand Octopus

Wednesday, August 7, 2019

Creeping Comb Jelly


We just learned about the Blue Jellyfish.

Another type of jellyfish is the Creeping Comb Jelly, or Coeloplana Astericola.

This type of jelly is actually lives on top of a starfish!

They are small and yellow, and they almost look like little worms with strings hanging off of them.


(from: wikipedia - coeloplana astericola)


373 Seraya Tulamben 23.10.2016 - Jacinto Castillo

Kid Facts - Blast from the past: Joubin's Squid

Wednesday, July 31, 2019

Blue Jellyfish


We just learned about the Velella the sea sail hydrozoan.

Another type of jellyfish is the Blue Jellyfish, also called the bluefire jellyfish, Cyanea lamarckii or cyanea nozakii.

This is a small blue or yellow jellyfish grows to about 1 inch wide.
They mostly live around the areas of Europe by Sctoland and England.

They do have stinging tentacles that hurt a little if a person gets stung, but they will not kill anyone.


(from: wikipedia - blue jellyfish)


Blue jellyfish and Saithe from Norwegian coast - DanOlsen

Kid Facts - Blast from the past: Stumpy Spined Cuttlefish

Wednesday, July 24, 2019

Velella


We just learned about the Portuguese Man o' War that looks like a jellyfish but is a hydrozoan.

Another type of hydrozoan is the Velella, also called the sea raft, by-the-wind sailor, purple sail or little sail.

These are small blue animals that float along the top of the water, and have what looks like a little sail on top of their body.

The sail catches the wind and helps these animals move along the water.

They are very small, only about two and a half inches.
Just like other hydrozoans, they are actually a bunch of small animals all stuck together.
They use small tentacles to catch things like plankton with stingers and then eat them up.

The stingers don't hurt humans, but might make their skin itch a little.


(from: wikipedia - velella)


Mass stranding Velella velella on Menorca May 2013 - JNJPO

Kid Facts - Blast from the past: Ammonoidea