Molly Miller Blenny (Scartella cristata / Molly Miller Blenny)
A hardy and highly useful marine species, the Molly Miller Blenny is prized for its algae-grazing abilities and energetic personality. With its mottled brown coloration and expressive behaviour, it is both a practical and entertaining addition to reef and community aquariums.
Compatibility: Peaceful to semi-aggressive. Generally mixes well with clownfish, gobies, wrasses, and tangs. Can become territorial with similar blenny species, especially in smaller aquariums.
Reef Compatibility: Reef-safe. Harmless to corals and most invertebrates. Excellent for helping control nuisance algae and occasionally even pest aiptasia.
Diet: Omnivore – primarily feeds on algae, biofilm, and detritus. Will also accept marine flakes, pellets, mysis shrimp, and vegetable-based foods. Feed 1–2 times daily alongside natural grazing opportunities.
Water Parameters:
Temperature: 24–27°C
Salinity: 1.023–1.026 SG
pH: 8.1–8.4
Minimum Tank Size: 60–80L
Care Level: Easy – hardy, adaptable, and suitable for both beginner and experienced marine aquarists. Thrives in mature aquariums with plenty of rockwork for grazing and shelter.
Top Tip: Provide plenty of live rock with algae growth for natural grazing. Keeping the fish well-fed helps reduce territorial behaviour toward other blennies or bottom-dwelling species.
Whether you’re collecting from our store, ordering dry goods, arranging local delivery or having livestock delivered nationwide, we’ve made it simple to choose the right option.
Click & Collect
FREE COLLECTION FROM OUR STORE
Place your order online and select Click & Collect at checkout.
Livestock will normally be bagged when you arrive, helping to minimise the amount of time animals spend packaged. If you’d prefer your livestock to be ready beforehand, simply contact us in advance.
Local Delivery
DELIVERED BY TROPICAL SUPPLIES • WITHIN 25 MILES
Order from our in-store range and have it delivered directly to you using our own local delivery service.
Minimum order: £50
Local Delivery Charges: Up to 5 miles — FREE 5–10 miles — £10 10–15 miles — £15 15–20 miles — £20 20–25 miles — £25
Distances are measured “as the crow flies” rather than by road.
Once your order has been placed, we’ll contact you to arrange a suitable delivery date and time. We often combine nearby orders into efficient delivery runs, so local delivery may take a little longer during busy periods.
Ordering a large aquarium? Please make sure someone is available to help unload the aquarium from our van when we arrive.
Dry Goods Delivery
FREE UK Delivery Over £75
Spend £75 or more on eligible dry goods and receive FREE UK delivery on orders weighing up to 20kg.
A great opportunity to stock up on food, treatments, filter media, accessories and other aquarium or reptile essentials while saving on delivery.
Free delivery applies to eligible orders up to 20kg and excludes livestock, aquariums, terrariums and other oversized items.
Qualifying orders will automatically show the FREE UK Delivery option at checkout — no discount code required.
Standard Parcel Delivery
Our standard parcel delivery charges are calculated according to the weight of your order and the available delivery service.
Orders placed before 12 noon may be dispatched the same day on our current dispatch days.
Express Pallet
75–500kg • Usually 1–3 working days
Designed for large and heavy orders that cannot be sent using our standard parcel service.
Please note: We currently dispatch parcels Wednesday to Friday.
Adding Something to an Existing Order?
If your original order hasn’t been dispatched yet, simply place the additional items as a Click & Collect order and leave us a note asking us to combine them with your existing order.
Available to Order
See something you want that we don’t currently have on the shelf? Many of our products can be quickly sourced from our suppliers.
Products marked Available to Order are not currently held in stock at our store but are available for us to order on your behalf.
Most items arrive with us within a few days and usually no longer than a week, depending on supplier availability.
Once your item arrives with us, we’ll either dispatch your order or let you know it’s ready for collection, depending on the delivery option you selected.
After receiving your order, we’ll check availability with our supplier. If there are any issues or expected delays, we’ll contact you to let you know.
Nationwide Livestock Delivery
Have your new livestock delivered safely to your door using our specialist livestock delivery service.
Minimum livestock order: £50
Thursday Delivery — £24
Order by: Wednesday, 12 noon Dispatched: Wednesday afternoon Delivered: Thursday before 1pm
Friday Delivery — £24
Order by: Thursday, 12 noon Dispatched: Thursday afternoon Delivered: Friday before 1pm
Saturday Delivery — £29
Order by: Friday, 12 noon Dispatched: Friday afternoon Delivered: Saturday before 1pm
Livestock Delivery Exclusions
Unfortunately, our specialist livestock courier is currently unable to deliver livestock to the following postcode areas:
All BT, HS, IM, IV, JE and KW postcodes are also excluded.
If you’re unsure whether we can deliver livestock to your address, please contact us before placing your order and we’ll be happy to check for you.
Add Dry Goods to Your Livestock Order
You can include suitable dry goods with your livestock delivery, making it easy to add food, treatments, filter media, accessories and other supplies at the same time.
Please note: Livestock deliveries cannot include frozen food or heavy items such as gravel, sand or other unsuitable bulky goods. These items must be ordered separately using an appropriate delivery method.
Already Placed Your Order?
No problem. If your livestock order hasn’t been dispatched yet, place another order using Click & Collect and leave us a note asking us to combine it with your existing order.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.