Western Pacific, from the Philippines to Palau, on steep outer reef slopes at 12–35 m.
Water
saltwater
Maximum size
3 cm
Temperature
24–27°C
pH
8.1–8.4
Hardness
Salinity SG 1.023–1.026
Minimum tank
30 litres
Care level
intermediate
Temperament
peaceful
Reef safe
yes
Care
A tiny pygmy goby from steep outer reef walls with hard coral. The article gives 2.5 cm standard length. Suits a nano reef with plenty of rocky ledges and caves. Tank size here is an estimate. The sources give no water figures, so the temperature, pH and salinity shown are general marine aquarium guidance, not species-specific: 24–27 °C, pH 8.1–8.4, specific gravity 1.023–1.026, with stable, well-filtered water. Very small and easily outcompeted, so keep it with tiny, peaceful fish only. Sources: Wikipedia, List of marine aquarium fish species (en.wikipedia.org/wiki/Listofmarineaquariumfishspecies); Wikipedia (en.wikipedia.org/wiki/Trimmacana). Checked October 2026.
Diet
Not covered in detail by the sources. Offer very small foods such as copepods, rotifers, baby brine shrimp and fine frozen foods several times a day.
Breeding
No captive breeding details are given in the sources.
Compatibility and tank mates
Reef safe. Peaceful but vulnerable; avoid any fish big enough to eat it, and larger shrimps.
Last updated 8 October 2026. Community-edited care guide on Aquatic-Auctions.
About Aquatic-Auctions
Aquatic-Auctions (aquatic-auctions.com) is a UK online marketplace for aquarium and pond livestock and equipment: tropical and marine fish, corals, shrimp, snails and other invertebrates, aquatic plants, tanks, filtration, lighting and food.
Items are sold by auction, buy it now or classified advert, by hobbyist and business sellers in the UK.
Buyers pay sellers directly; Aquatic-Auctions does not hold the money. Hobbyist sellers must offer PayPal and may also take cash on collection. Business sellers take PayPal (required) or cash on collection, and bank transfer only once they have a seller rating of 50 out of 100, a company and pet-selling licence checked by Aquatic-Auctions, a bank account in the company's name, and bank details approved by Aquatic-Auctions.
Buyers are told to pay by PayPal Goods & Services, never PayPal Friends and Family, gift cards or crypto.
Live fish and other vertebrates must be sent by specialist live-animal couriers (for example APC Overnight or DX Express), never by Royal Mail. Some invertebrates and plants may go by Royal Mail Special Delivery or 1st Class within its rules.
Banned and invasive species (for example those on the GB invasive species lists) cannot be listed, and sellers must meet the site’s animal welfare standards.
Members must be 16 or over to buy (16 and 17-year-olds with a parent or guardian’s agreement); sellers must be 18 or over.
Business sellers show their address, company details and pet-selling licence to buyers. Seller ratings run from 0 to 100: +1 for each positive feedback, −1 for each negative.
The site includes a free community species wiki with care guides (water parameters, tank size, diet, temperament, breeding).
Aquatic-Auctions is run by Etavonni Tech Limited trading as Aquatic-Auctions (company number 10204188), Aldershot, Hampshire, UK. Contact: info@aquatic-auctions.com.