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We are going to partake in a survey of local jellyfish this year, details below.

To identify the type see pictures HERE

Report these to the registrar who will fill in the form


Seadream Education Plymouth Devon

                                   Jellyfish of South Devon: Survey 2019-2020



During 2019 and 2020, we are investigating which species of jellyfish are found in the waters off South Devon and developing new methods to detect jellyfish presence.


Who are Seadream Education?

Seadream Education CIC is a non-profit Community Interest Company, set up by marine biologist Dr Juliette Jackson.  The company has two other directors, both marine scientists, and delivers interactive science and engineering workshops, school outreach, public engagement and marine research.


What is the purpose of the study?

We want to find out if jellyfish numbers are increasing in our local waters and if new species are starting to arrive. We also want to develop a new technique to detect the presence of jellyfish by just testing a sample of seawater.  This is known as sampling for eDNA (environmental DNA).


What does the study involve?

There are several parts to the study:

  1. We are asking people to report sightings of jellyfish to us (Citizen Science).
  2. We are collecting samples of water from sites around South Devon.  These will be tested to see if jellyfish DNA is present.
  3. We have put some pvc plates in local marinas to see if jellyfish larvae settle on them.  Some jellyfish spend part of their life attached to the seabed and part of their life drifting with the sea currents. We will examine the plates to see what organisms settle.
  4. We will carry out regular surveys at some sites to see if jellyfish are present.


If I help, what will I do? Citizen science

We want you to tell us what you have seen - the species, when and where.  We will email you a jellyfish i.d. card and a report form.  The form is quick to complete and can be emailed back to us or you could email a photo of the completed form.  We would also love to have photos of the jellyfish you see. 

If you are a member of a local club or group we are happy to visit your organisation to collect forms in person if you prefer.  We can provide a large envelope to leave at your club/organisation.

The form includes questions about what you were doing (e.g. swimming, fishing) and for how long. You don’t need to fill all of these parts in, but they do help us compare the number of jellyfish reported at different places e.g. someone swimming is more likely to see jellyfish than someone walking on the beach but someone walking a long stretch of coast may see more than someone swimming in one small area.

We also ask you to estimate the size of the jellyfish and the numbers you see.  This helps us understand whether the jellyfish are young or adult and may tell us more about where they are breeding.


How do I join/get more information?

Contact us using the contact sheet on our webpage

Or email us at

Or send us a message on Facebook


Privacy, Personal Data and GDPR

We don’t want to know lots of personal information, but we do need the following to help us check that we are getting jellyfish sightings from real people and to contact people if we have a question about the report:


Your name:            

We want to make sure you are a real person and check that we don’t have duplicate records.  We need to know how many people have taken part.

Your email address:

Mostly, we will use email to send out/receive forms, as this does not use a lot of paper.

If you are under 18:

We are happy to have adults or young people helping but if you are under 18 we ask parents/guardians to be the person we contact and you must have your parent or guardian’s permission to go out looking for jellyfish. We will ask people for their date of birth so that we can (1) check they are adults and (2) see if we are getting volunteers of different ages.

When you saw the jellyfish - What you were doing, where and for how long?

We use this information to work out how much “effort” has been made to find jellyfish at each location by adding up the total amount of time spent by everyone, at each place, doing the same type of activity. 

Your club - if applicable

If you join our study through your club / we collect your completed forms from your club we will make a note of which club you belong to. 


More Information:

Seadream Education CIC is the data controller and Processor for the purposes of the General Data Protection Regulation.  More information about Seadream and how it handles data can be found in the Seadream Education and Privacy Notice (v1.0 date 31 March 2019) which can be provided upon request.


Contact Details:

Seadream Education CIC

The Water Tank,