in the surf where it sometimes attacks swimmers (Schultz, 1969). 

 Another isopod, Anoinus depressus , was also common at this station, 

 followed by lesser numbers of small polychaetes, amphipods, and 

 nemerteans . 



Subtidal stations HS-2 and HS-3 were characterized by very 

 low densities, ranging from 425 to 475 individuals per square meter, 

 respectively. Exclusive of oligochaetes, stations HS-2 yielded the 

 lowest number of species (three) collected from any station. The 

 most abimdant organism was an unidentified larval caridean. At 

 station HS-3, just inside the first reef, the polychaete, Prionospio 

 cvistata, was the most common of 11 species collected, comprising 

 45.4 percent of the total sample. 



In deeper water seaward of the first reef, stations HS-4 

 and HS-5 yielded extremely high densities of 11,305 and 17,144 

 individuals per square meter, respectively. Numbers of species 

 also showed a sharp increase (Fig. 6) over the shallower stations; 

 polychaete and oligochaete annelids were by far the dominant taxa. 

 Oligochaetes were especially numerous at HS-5, where they comprised 

 52.7 percent of the total fauna. 



b. Golden Beach . Station GS-1 yielded fewer species and 

 individuals" than any other station on this transect, as might be 

 expected in the extreme environmental conditions within the inter- 

 tidal habitat. Furthermore, the number of animals per square meter 

 was considerably lower than at the equivalent station (HS-1) at 

 Hallandale Beach (93.5 individuals per square meter compared to 

 1,530 individuals per square meter). Most of this difference 

 between transects was due to the absence at Golden Beach of the 

 two isopods (Euryd-ioe littovalis and Anoinus depressus') which 

 together made up over 75 percent of the fauna at Hallandale. 



The shallowest subtidal station (GS-2) was significantly 

 more productive than its counterpart at Hallandale, in terms of 

 both numbers of individuals (Fig. 5) and species (Fig. 6). This 

 station was dominated by the polychaete, Saolecolepides viridis; 

 several species of amphipods were also common. Station GS-3 just 

 inside the first reef, was about as productive in number of indi- 

 viduals and species as HS-3. As at Hallandale, the most abundant 

 organism was the spionid, Prionospio cin-stata. 



A great increase in species numbers and abundance was 

 evident at stations GS-4 and GS-5 beyond the first and second reefs 

 (Figs. 5 and 6) where densities reached 15,631 and 14,552 indi- 

 viduals per square meter, respectively. Similarities between 

 transects at these offshore stations were manifested not only in 

 their high productivity relative to the inshore stations but also 

 in their faunal composition. At both Hallandale and Golden Beach, 

 the most abundant organisms were the oligochaete worms and two 

 species of syllid polychaetes, Exogone dispar and Syllis (Typosyllis) 

 sp. 1, which occurred only at stations beyond the first reef. Ex- 

 cept for station HS-4, no significant differences (p < 0.05) were 

 foimd within or between transects for these outer stations, either 

 in numbers of individuals (Fig. 5) or species (Fig. 6). 



20 



