A commensal worm sometimes occupies the gills.
Information wanted: Please send any records of this fish, with
location, date, who discovered it, how it was identified, prevalence, common
name and any other details to
All messages will receive a reply.
Hannafore Point, Looe
Found an adult of this fish (20+cm) in a pool
at Hannafore Point, West Looe, yesterday. This is the first specimen of
this size that I have seen (they are more usually found at 4-5cm).
Despite being prodded and poked, caught and netted
out of the water, the fish, when returned, swam around but refused to leave
the area where it was caught. Is it likely that it was guarding eggs? I
no nothing of this species' biology but it preferred being caught than
swimming away. It would have made a lovely aquarium specimen but I let
it be in case it was nurturing a brood.
One was found on a Socite Jersiaise walk on Fliquet
beach, NE Jersey in 1999, under a rock surrounding by water just above
the LW mark it was a very large specimen about 340 grams (12 oz)
in weight, it was eventually returned to the sea and appeared very relaxed.
I had only seen very small fish previously in local waters.
I have received reports of flatfish under rocks
intertidally off Cornwall, especially Looe (in the Big Pool) which
from their behaviour of clinging to the underside of the rocks, I thought
was the Topknot, Zeugopterus punctatus, from over a decade ago.
I have not subsequently received any other reports,
and as time lapsed I was apt to put these reports to the back of my mind.
This was further emphasised by aquarium study
that found that this fish was intolerant of high temperatures. However,
I have measured the temperature in the large Devon and Cornish pools and
many of the large ones fail to exceed 20° C despite the low spring
tides occurring in the middle of the day.
Topknots are not found intertidally on Sussex
shores, although they are found in deeper water.
17 August 2001
As requested, whilst diving, we encountered a Topknot of approx 25
- 30 cm (10-12 inches) in length in around 6 metres of water, 50 metres
from the north tip of St. Mary's Lighthouse, Northumberland. The fish was
sitting in the open, unprotected, on a rock.
While Terry was trying to photograph it, it disappeared under a large
rock, as we could see right through the gap under the rock, neither of
us could understand how we couldn't still see it, but I've since read about
their ability to cling onto the underside of rocks so I guess it must have
been hiding there.
caught a Topknot
whilst fishing the inner harbour from the Breakwater at
Dover (Friday May 3rd 2002). It was a sunny bright
day, with a cool North Eastly of around Force 4. Having not even heard
of the species before, and sure that my mates were pulling my leg over
its name, I looked it up on the WEB and found your request for info on
the British Marine Life Study Society
Site. Not too sure what data you are after exactly,
so here's what information I have, plus the usual fishermans photo of yours
truly grinning with the fish ... sorry ;-)
It was caught on the bottom hook (Size 2) of what's
known as a Wessex Rig. The flowing trace in this case being about 3 ft
long, with a final hook length of about 10 inches. Sorry I haven't gone
metric yet ! It fell to a whole freshly peeled peeler crab which was about
half the size of a credit card. A small whiting (about 4 oz) was
caught at the same time from the top
hook, which was also baited with a similar sized
crab on a size 2 hook. Therefore, although the bite seemed to suggest that
a flattie had taken the bait, it is impossible to say which fish actually
registered the bite on my rod.
Strong currents run along the Breakwater which
is a about a mile out to sea. As the tide comes in, so the current runs
strongly West, then there is a very short slack period (20 minutes or so)
before it reverses and runs East for a short time (30 - 45 minutes). It
then seems to realise that it is going in the wrong direction and so goes
slack, as if checking its compass for around 20 minutes, before heading
off like a steam engine directly back West again. It continues going West
until high tide, when another slack period of around an hour or so is experienced.
The currents on the inner side of the seawall where I caught the Topknot,
follow this same pattern but are not quite as strong as those experienced
when fishing the outer seawall. The fish was caught during the 'compass
checking' slack period which occurred about an hour before high tide.
The Topknot was weighed on the club scales and
came to exactly 8 ozs. It was identified as a Topknot by the steward of
the Dover Sea Angling Club who said that one or two got caught from the
Breakwater every year. In fact he made specific mention of one caught just
a few weeks ago that he thought was about 3 times the size of my fish.
After weighing the fish was returned to the water, where it arched its
back and headed in a steep swift dive for the bottom.
Trust that some of this stuff is useful to you
A fishy Tale,
The flatfish, Topknot
is a dark brown colour and tends to live in rocky areas rather than on
sand and when diving on a reef in Mounts Bay we often disturbed them on
the bottom and they would sometimes flick up onto a vertical surface and
stick there by suction. We also used to find them stuck to the rocks in
vertical cracks. When our Club Diving Officer disturbed one recently the
fish flicked up and stuck itself to his drysuit.