Afternoon 
Only three low tides were worth taking advantage of this month. Friday and Saturday night each had a low tide of 0.95m (anything under 1m is worth a trip), and Saturday's daytime low tide was 1.08m, again pretty respectable 
What usually happens before these trips is a visit to the MarLin sealife website, where we have another glance at animals we haven't seen, but have been recorded here - the 15-spined stickleback is a good example. Basically, we set ourselves up for disappointment 
Happily, these three low tides have yielded the most diverse range of life we have ever come across at Holbeck, and we found TWO new species! 
I shall start with the Chordates, ie - fish
Most ofn the following pictures were taken during the Saturday daytime low tide - as catching and photographing fish at night is quite a challenge 
This fish, however, was found last night, almost straight away. It is a Long-Spined Scorpion Fish, and is pretty common. We saw similar sized species during our mid-shore rockpooling. This fella was close to 15cm in length...
As I've mentioned before, Butterfish are b*ggers to catch, so this was a daytime photo. This particular example was about 10cm long...
We were having bad luck with the 5-bearded Rocklings, as we had failed to catch several large examples (15-20cm). We eventually had to make do with this 10cm long rockling...
Shanny's are very common here, and therefore we had no problem choosing which one we wanted a photograph of. We settled for this colourful one...(10cm long)
Now to the new species! We didn't know what it was at the time, but after consulting MarLin, we identified it as a Two-Spotted Goby. They are quite easily identified to be honest; blue markings down the side of the body, and a dark mark just before the tail fin. They are not very big at all - we found two and both were about 6cm long...
The only unidentified species of the night was this small fish. I can't find anything similar on MarLin after having a quick check. I'm guessing it is a juvenile, our particular example - it could be that it looks a fair bit different when it is an adult. It is very similarly shaped to a Long-Spined Scorpion Fish IMO, although I'm just guessing!
On to the crustaceans! We did pretty well with these, and I'll start with the usual three...
A couple of pictures of good-sized Edible Crabs. Typical carapace widths of 12cm...
A couple of Shore Crab pictures. Again these were in plentiful supply under the rocks on the mid shore. The bigger examples had carapace widths of about 8cm...
Of course we had to photograph a Swimmer Crab! This one was saluting us, probably Carapace width typically 8-9cm for the larger ones...
It was about this time last year when we found a very large hermit crab. We struck it lucky again and found three very nice sized hermit crabs, one of which was the same size as last years monster...
Unfortunately it didn't want to come out for us, so this was the best we could get 
Holbeck is changing. In the last few months, basically from summer onwards this year, we have found Porcelain Crabs and Squat Lobsters in increasing numbers. This time last year, and at the beginning of this year, we found none at all, not one. They were present at Cornelian Bay and Scalby Mills, but never Holbeck. So here are the species that have abandoned Scalby Mills and forged a home at Holbeck instead!
Squat Lobsters were under most rocks at the lower shore, typically no longer than 2cm body length...
Long-Clawed Porcelain Crab. Again pretty tiny, carapace widths never exceed 1cm...
Finding Broad-Clawed Porcelain Crabs was unexpected. We only found three, but like I mentioned, they never used to be present here! They are usually a little bit bigger than their Long-Clawed counterparts. And a whole lot fluffier!
Now for the star of the show! A new species of crab! We quickly ID'd it as a Bristly Crab, again thanks to MarLin's excellent website. What is even more special about this little crab is that it has not been recorded at Scarborough before We have submitted our record to MarLin, and hopefully they will put a little dot on their distribution map next to Scarborough!
We found two altogether, one on Friday night, and one on Saturday night. They are well camouflaged underneath the rocks, and both examples had carapaces no wider than 1cm...
We had learned our lesson after the rather poor first picture. We needed a more constrasting background for Saturday's example...
Much better!
We found the most common shrimp and the most common prawn. Here is the Palaemon spp. of prawn, nicknamed the Glass Prawn...
And the most common shrimp - the Brown Shrimp - Crangon crangon - a favourite of mine
Lobsters were also found. Two in total, very different sizes as well, which made for good comparison. Here is the smaller one, just 15cm long (body)...
Here is the bigger one, which was about 30cm long. What was most amusing about these two was the sheer ease of catching them. For the big lobster, we were busily following a large rockling and lifted a big rock over - and there we find a 30cm lobster underneath!
We wanted a good size comparison, so here is a photo of both lobsters, one behind the other...
Quite a difference!
We did very well with the Echinoderms (starfish, urchins etc) I'll start with the starfish, the first picture being of two starfish, one about8cm across, the other one about 5-6cm across...
The next photo has a very interesting starfish in it. It has just four arms. They can lose an arm and regenerate it, but rare examples only ever have 4 arms (other rare mutations include 6, 7, and 8 armed examples). There was no stubby little arm regenerating, or any sign that it had just lost an arm. As you can see the 4 arms it had were very evenly distributed...
Also in that picture is a Green Sea Urchin and a small piece of Edible Sea urchin test.
Here is another Green Sea Urchin, this time not overshadowed by a mutated starfish 
We found quite a lot of Brittlestars, in a variety of environments too. Typically, they are underneath large rocks though, as this one is. (diameter of 6cm)
Some of you may remember that we found a rather large edible sea urchin at the beginning of the year. It was about 15cm across and was found at night at a tide very similar to recent low tides (<1m). Well, we found another! it wasn't quite as big, but 10cm across is still very reasonable. We have now found four Edible Sea Urchins in total, with this one being the second biggest...
It is worth checking the holdfasts of Kelp weeds on the lower shore. You can find a good range of organisms nestling in there. We found small edible crabs, brittlestars, isopods, and...Blue-Rayed Limpets...
This particular example was actually at the base of the kelp frond, but many more were found in the holdfasts - they are just more difficult to photo!
Finally, we had a rare visitor to Holbeck during Saturday day. We never got near this Heron, so that is why the picture quality isn't great. Seeing them fly efforlessly is quite a sight
Thanks for viewing I appreciate this thread is rather long and tiresome to read through! 
We didn't mean to find so much if I'm honest! 
Comment and views are always much appreciated 
Thanks,
Steve