Gobies
These fishes belong in the "Order Perciformes" and "Suborder Gobioidei" as members of the "Family Gobiidae" (Gobies) consisting of 53 genera, with 345 species.
Certainly the largest group of 'aquarium' fishes and another group of fishes that do extremely well in the reef aquarium. They are small, easy to maintain, generally feed on zooplankton and benthic crustaceans, yet, take a variety of foodstuffs. They are also quite interesting to watch, besides being peaceful and fairly inexpensive. Often confused with blennies, but blennies have one dorsal fin and gobies have two. The prawn gobies listed below frequently live in symbiosis with prawns/shrimp.
This genus, which is comprised of 14 species, have members that spend most of their time hovering in the water column. Mostly omnivores, they feed upon both algae and plankton/benthic invertebrate. Some are quite hardy and make good beginner fish, while others are troublesome and require dedication and experience if they are to survive.
The genus Elacatinus was originally classified as a sub-genus of Gobiosoma, however was elevated to full genus status about 1990. There are at least 30 known members of this genus, with many of them being 'cleaner gobies' that clean other fishes of external parasites. However, they will accept other meaty foods in the aquarium. Their natural diet consists of benthic organisms, e.g., copepods, foraminiferans, along with coral mucus and tissue. Because of their small size and their association in the wild with stony corals, it's probably better to maintain them in a small aquarium with some sps corals.
Often called coral or clown gobies, these small gobies are often found among the branches of stony corals. There are at least 16 named species, and their natural diet consists of benthic organisms, e.g., copepods, foraminiferans along with coral mucus and tissue. Because of their small size and their association in the wild with stony corals, it's probably better to maintain them in a small aquarium with some sps corals. They will quarrel with members of their own species and genus, therefore, one per aquarium unless it's a very large aquarium with numerous coral heads. Unfortunately they are prone to Marine Ich (Cryptocaryon irritans).
(The five species from this genus can be identified from the 'Gobiodons' because they lack any major degree of lateral compression and have remarkable beard-like bumps and projections on the head. Due to the infrequent availability of these gobies there has been little written about their suitability in marine aquaria. Given their similarity in terms of the habitat they occupy to Gobiodon spp. it is likely that they will do as well in captivity provided enough food is available to them and especially in the presence of their host SPS corals. My own experience with the genus Paragobiodon centers around two species. I found that they were quite hardy although they could be difficult to induce to feed. Due to their relatively small size upon import they can be fed live brine shrimp nauplii if they refuse any larger frozen foods. Species form either monogamous pairs or male dominated harems and although breeding reports are scarce this is probably more to do with the lack of hobbyists keeping them than their reluctance to spawn. Given that these species do not occupy Acropora sp. SPS corals in their natural environment they would make excellent gobies in addition to Gobiodon spp. for an aquarium that is home to a variety of such corals. - Tristan Lougher)
This genus contains one species of interest, the burrow creating S. biocellatus. It uses its mouth to carry away sand and rubble, thereby creating a home in the sediment. Usually observed in pairs in the wild where it feeds by taking large amounts of sand in its mouth and sifting out benthic invertebrates. Very difficult to maintain in the home aquarium, as most slowly starve to death.
This genus consists of 39 identified species, with many still waiting to be identified. All are quite small, i.e., less than two inches (5 cm) in length. One male usually dominates a group, with all others being females. If the male dies, one of the females will become a male. Should a larger, stronger male become the leader of the group, the less dominant male will return to being a female. And do so quickly, sometimes in as little as four days! All species are peaceful and in the wild feed upon zooplankton and benthic invertebrates. In the aquarium, they will accept meaty foods such as brine shrimp and mysis shrimp. They are perfect inhabitants for small nano reef systems.
This small genus contains only 7 described species as of yet, and contains the smallest of all gobies.
This genus is comprised of 15 species. Usually called 'Sleeper Gobies' and come highly recommended as sand shifters. Even though they have scoop-like jaws, they are often short lived unless kept as a mated pair. Most sold in pet stores are males, and finding a female is almost impossible. They feed mostly on tiny crustaceans and worms, and the species V. strigata may eat small fishes, such as Neon Gobies. These fishes are burrow dwellers, and will normally seek protection under low overhanging rocks or actually burrow underneath rock to from a secure home. Often, in the wild, their burrows will be occupied with juveniles from the surgeonfish family. They should be housed in aquariums with a sandbed of at least two inches in depth and not housed with aggressive fishes such as groupers, dottybacks, triggerfishes or aggressive angelfishes. Usually, they stave to death in closed systems unless there is few competitors for their food supply, or may simply jump out of the aquarium.
Those in this genus are difficult to identify because they come from a wide range, i.e., East Africa to the Indo-West Pacific and have amazing geographical color variations.
Anemonefishes - Angelfishes - Anthias - Assessors - Bannerfish - Basslets (Dottybacks and Grammas) - Batfishes - Blennies - Boxfishes - Butterflyfishes - Cardinalfishes - Catfishes - Cuttlefish - Damselfishes - Dartfishes - Dragonets - Drums - Eels - Filefishes - Flashlight fishes - Flatheads - Frogfishes - Goatfishes - Gobies - Groupers - Hamlets - Hawkfishes - Helmut Gurnards - Jacks - Jawfishes - Lion fishes - Livebearing Brotula - Lizardfishes - Mollies - Moorish Idol - Parrotfishes - Pinecone fishes - Pipefishes - Porcupine fishes - Pufferfishes - Rabbitfishes - Rays - Sand Perches - Scats - Scorpionfishes - Sea Basses - Seahorses - Sea Moths - Sharks - Shrimpfishes - Snappers - Soldierfishes - Spinecheeks - Squirrelfishes - Surgeonfishes (Tangs) - Sweetlips - Tilefishes - Triggerfishes - Trumpetfishes - Wrasses - Oddballs
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